A complex preposition is a fixed group of two or more words that functions as one preposition, linking a noun phrase, pronoun, or other complement to the rest of a sentence. Examples include because of, in front of, in addition to, and with respect to. Complex prepositions express relationships such as cause, location, contrast, time, and reference.
Key Facts at a Glance
A complex preposition contains at least two words but performs the grammatical function of one preposition.
The usual pattern is complex preposition + noun phrase, as in because of the storm.
Many complex prepositions are fixed expressions, so changing the final word can produce an error.
A following gerund normally takes the possessive or objective form required by the construction: in addition to studying.
Complex prepositions do not automatically make writing better; a shorter form is preferable when it preserves the meaning.
Word count alone does not prove that a phrase is a complex preposition. Meaning, fixedness, and grammatical behavior also matter.
What Is a Complex Preposition?
A complex preposition, also called a phrasal preposition or multi-word preposition, is a multi-word expression that introduces a prepositional phrase. The expression acts as a unit even though its parts may originally have been an adverb, adjective, noun, article, or simple preposition.
The basic formula is:
[Complex preposition] + [object or complement] = [prepositional phrase]
Examples:
- because of the delay
- in front of the museum
- according to the contract
- with respect to your request
The object is usually a noun phrase, pronoun, or gerund phrase. In They left because of the noise, the noise is the object of because of. In She succeeded in spite of working late, working late is a gerund phrase functioning as the complement.
A phrase such as in front of is different from three unrelated words that happen to appear together. The phrase has a conventional meaning, normally takes an object after of, and can be moved as a complete unit: In front of the museum, we met our guide.
How Do Complex Prepositions Work?
Complex prepositions establish a relationship between an element in the main clause and the object of the preposition. The relationship may be spatial, causal, temporal, contrastive, additive, or logical.
Writers generally use a four-step process:
- Identify the relationship. Decide whether the sentence needs cause, contrast, location, time, addition, or another meaning.
- Choose the fixed expression. Select because of for cause, in spite of for contrast, or in front of for location.
- Attach the correct complement. Follow the preposition with a noun phrase, pronoun, or gerund phrase.
- Place the whole phrase. Put it before the main clause or after it, adding a comma after a sufficiently long introductory phrase.
Examples:
- Because of the power failure, the clinic closed early.
- The clinic closed early because of the power failure.
- In spite of feeling tired, Maya finished the report.
- Maya finished the report in spite of feeling tired.
A complex preposition does not introduce a complete finite clause in the same way that a conjunction does. Compare because of the storm, a prepositional phrase, with because the storm intensified, a subordinate clause.
What Can Follow a Complex Preposition?
| Complement type | Example | Status |
|---|---|---|
| Noun phrase | because of the rain | Standard |
| Object pronoun | between you and me | Standard |
| Gerund phrase | instead of driving | Standard |
| Possessive plus gerund | in addition to her applying | Formal but grammatical |
| Finite clause | because of the rain stopped | Incorrect |
| Infinitive | in order to leave | Special purpose construction |
The distinction between a gerund and a finite verb matters. In They stayed because of the rain, rain is a noun. In They stayed because it rained, it rained is a clause introduced by the conjunction because, not by because of.
What Are the Main Types of Complex Prepositions?
Complex prepositions can be grouped by form, but meaning and grammatical behavior are more useful than word count. Some two-word combinations are highly fixed, while some longer phrases behave more like ordinary noun phrases in particular contexts.
Two-Word Complex Prepositions
| Complex preposition | Meaning | Example |
|---|---|---|
| according to | source or authority | According to the report, sales increased. |
| along with | addition or accompaniment | The package arrived along with an invoice. |
| apart from | exception or addition | Apart from Tuesday, every date works. |
| because of | cause | The match ended because of lightning. |
| due to | cause or attribution | The delay was due to equipment failure. |
| except for | exception | The hall was empty except for two technicians. |
| instead of | substitution | Use email instead of a paper form. |
| owing to | cause, usually formal | Owing to flooding, the road closed. |
| prior to | before, formal | Submit the form prior to departure. |
| regardless of | without being affected by | The rule applies regardless of age. |
Many of these expressions end in a simple preposition such as to, of, or from. Their final words are not interchangeable. Standard English uses according to, not according with, and regardless of, not regardless to.
Three-Word Complex Prepositions
| Complex preposition | Meaning | Example |
|---|---|---|
| by means of | method or instrument | The lock opens by means of a code. |
| in addition to | addition | In addition to rice, serve vegetables. |
| in accordance with | conformity | The work complies in accordance with the specification. |
| in front of | position | The taxi stopped in front of the hotel. |
| in lieu of | replacement, formal | The company offered time off in lieu of overtime pay. |
| in spite of | contrast | They continued in spite of the noise. |
| on behalf of | representation | I signed on behalf of the director. |
| in terms of | criterion or respect | The design performs well in terms of durability. |
| with respect to | reference or subject | We have questions with respect to the warranty. |
| by virtue of | because of a status or condition | She qualified by virtue of her experience. |
The phrase in accordance with means “in agreement with” or “according to a rule.” The ending is with, not of. The sentence The procedure was completed in accordance with the policy is standard.
Four-Word and Longer Expressions
| Expression | Meaning | Example |
|---|---|---|
| as a result of | consequence or cause | Costs rose as a result of shortages. |
| with the exception of | exception | All rooms, with the exception of Room 4, were inspected. |
| in the event of | condition or possible occurrence | In the event of a fire, use the stairs. |
| for the purpose of | intended aim | The data was collected for the purpose of comparison. |
| in the absence of | without something present | In the absence of evidence, the claim remains unproven. |
Longer expressions can increase precision, but they can also conceal a simpler alternative. As a result of the storm may be useful in a formal explanation, while because of the storm is usually shorter and clearer.
Which Meanings Do Complex Prepositions Express?
| Meaning | Common forms | Example |
|---|---|---|
| Cause | because of, due to, as a result of | The flight was canceled because of fog. |
| Location | in front of, next to, on top of | The keys are on top of the cabinet. |
| Contrast | in spite of, despite, regardless of | They played in spite of the rain. |
| Addition | in addition to, along with, together with | Along with the manual, the box contains a cable. |
| Substitution | instead of, in lieu of | Choose tea instead of coffee. |
| Reference | according to, with respect to, in terms of | According to the schedule, boarding starts at six. |
| Method | by means of, through the use of | The sample was identified by means of spectroscopy. |
| Condition | in the event of, in case of | In case of emergency, call reception. |
| Time | prior to, in advance of, at the time of | Register prior to the examination. |
| Representation | on behalf of | The attorney spoke on behalf of the client. |
Are Complex Prepositions Always Formal?
No. Because of, in front of, instead of, and next to are common in ordinary conversation. Forms such as prior to, with respect to, by virtue of, and in lieu of occur more often in formal, legal, administrative, or academic writing.
Register depends on the expression, not merely its length. A three-word phrase such as in front of is natural in speech, whereas the two-word phrase prior to can sound bureaucratic when before communicates the same meaning.
Simple Versus Complex Prepositions: Which Is Better?
A simple preposition contains one word, such as in, on, for, under, after, or through. A complex preposition contains multiple words and often supplies a more specific relationship.
| Criterion | Simple preposition | Complex preposition | Practical result |
|---|---|---|---|
| Word count | 1 word | 2-5 words | Complex forms occupy more space |
| Example | after the meeting | in addition to the meeting | Meanings are not always interchangeable |
| Register | Conversation and all-purpose prose | General, academic, legal, or technical prose | Expression determines tone |
| Precision | Often broad | Often more specific | Because of identifies cause |
| Editing option | Usually concise | Replaceable in some contexts | Prior to can become before |
| Object pattern | Preposition plus object | Fixed phrase plus object | Final word may not change |
The best choice is the shortest form that preserves the intended relationship. Replace in the event of rain with if it rains when a clause is more natural. Keep on behalf of the committee when the representation meaning cannot be expressed accurately by a shorter preposition.
Useful Short Alternatives
| Longer expression | Concise alternative | Meaning or limitation |
|---|---|---|
| because of | since, as | The alternative introduces a clause |
| in spite of | despite | Both take a noun phrase or gerund |
| prior to | before | Usually equal in meaning |
| in addition to | besides | Tone and scope can differ |
| with respect to | about, regarding | Regarding is often concise |
| by means of | by, through | Context determines precision |
| as a result of | because of | Causal meaning becomes less consequence-focused |
| in the absence of | without | Without may sound less formal |
How Do You Use Complex Prepositions Correctly?
Correct usage depends on fixed form, complement type, agreement, punctuation, and sentence meaning.
Use the Correct Ending
Memorize the entire unit rather than assembling it word by word:
- in accordance with the regulations
- in addition to the fee
- on behalf of the board
- with respect to the complaint
- in spite of the setback
Incorrect endings often arise from analogy with another phrase. In accordance of the rules is not standard because in accordance with is the established form.
Use a Noun Phrase or Gerund After the Preposition
A preposition normally takes a noun-like complement:
- They canceled the trip because of the forecast.
- They canceled the trip instead of traveling.
- In addition to writing, he edits reports.
Use a possessive before a gerund when the writer wants to emphasize the person or action as a noun-like event: We objected to his changing the schedule. In informal English, We objected to him changing the schedule is also widespread.
Place Introductory Phrases Carefully
An introductory complex prepositional phrase is usually followed by a comma when it is long or when the pause improves readability:
- As a result of the inspection, the company replaced the valve.
- In front of the courthouse, reporters gathered.
Short phrases may appear without a comma: After lunch we returned to work. The comma is a punctuation choice, not a property unique to complex prepositions.
Avoid Dangling Relationships
The prepositional phrase must logically modify the intended subject:
- Misleading: After reviewing the evidence, the verdict seemed surprising.
- Improved: After reviewing the evidence, the jurors found the verdict surprising.
The verdict did not review the evidence. Complex prepositions do not cause the dangling modifier, but long introductory phrases can make the error harder to notice.
Is Due to the Same as Because Of?
Due to and because of both express cause, but traditional grammar assigns them different syntactic roles. Because of freely modifies a verb phrase, while traditional edited English prefers due to after a form of be or beside a noun.
Compare:
- The train arrived late because of the signal failure.
- The train’s delay was due to the signal failure.
Traditional grammar may reject The train arrived late due to the signal failure because due to modifies the verb phrase arrived late. Modern dictionaries and usage guides record widespread prepositional use of due to, especially in general and professional prose. Writers following a strict formal style can avoid disagreement by using because of for actions and caused by or attributable to after nouns.
Neither expression introduces a finite clause directly:
- Correct: The event was delayed because of heavy rain.
- Correct: The event was delayed because heavy rain continued.
- Incorrect: The event was delayed because of heavy rain continued.
Where Do Complex Prepositions Cause Problems?
| Problem | Incorrect or weak form | Better form | Reason |
|---|---|---|---|
| Wrong final word | in accordance of the policy | in accordance with the policy | Fixed collocation |
| Clause after because of | because of the road was closed | because the road was closed | Clause requires conjunction |
| Gerund confusion | instead of to drive | instead of driving | Preposition takes a gerund |
| Unnecessary formality | prior to the start of the meeting | before the meeting | Shorter expression is clear |
| Redundancy | in terms of the context of the market | in the market context | Overlapping framing |
| Ambiguous attachment | She sent the file to the manager in front of the team | In front of the team, she sent the file to the manager | Clarifies location |
| Pronoun case issue | between you and I | between you and me | Prepositions take objective pronouns |
A frequent editing mistake is treating every formal phrase as more precise. With respect to may be appropriate in a policy notice, but about usually works better in an email. Precision comes from the relationship expressed, not from extra words.
How Can You Choose the Right Complex Preposition?
Use this decision sequence:
- Name the relationship: cause, location, contrast, addition, time, method, or representation.
- Check the complement: noun phrase, pronoun, gerund, or complete clause.
- Choose the register: spoken, neutral, academic, business, or legal.
- Check the fixed form: verify the entire phrase, especially its final preposition.
- Test a shorter alternative: remove words only if the meaning remains exact.
- Read the attachment: confirm that the phrase modifies the intended word.
- Check parallel structure: coordinate comparable forms, such as in addition to reviewing and revising, not in addition to reviewing and to revise.
For learners, a productive core set is because of, according to, instead of, in front of, and in addition to. These forms cover cause, source, substitution, location, and addition, which makes them more useful initially than rare legal expressions.
What Does Research Say About Their Frequency?
No universal percentage reliably describes the proportion of two-word, three-word, and four-word complex prepositions in English. Results vary according to the corpus, definition, genre, time period, and treatment of borderline phrases such as in spite of or in relation to. Therefore, precise claims such as “60% are three-word forms” require a named corpus and method.
Corpus linguistics does support a broader observation: formal written registers use many multi-word prepositional constructions that are less frequent in casual conversation. Academic prose commonly uses in terms of, with respect to, in addition to, and as a result of because those forms organize relationships between claims, evidence, criteria, and consequences. Frequency is not a recommendation. A frequent phrase can still be verbose in a particular sentence.
The practical rule is stronger than an unsupported statistic: choose a fixed expression for its meaning and register, then edit for economy.
When Should You Use Complex Prepositions?
Academic Writing
Academic writers use complex prepositions to define criteria and connect evidence:
- In terms of reliability, the second method performed better.
- The result occurred as a result of measurement error.
- In addition to temperature, humidity affected the reading.
Avoid stacking several framing phrases: With respect to the issue of the reliability of the method can usually become Regarding method reliability.
Business and Technical Writing
Business and technical documents benefit from explicit relationships:
- The replacement is required because of corrosion.
- The test was conducted in accordance with ISO 9001 procedures.
- The supplier acted on behalf of the distributor.
Technical writers should prefer before, after, under, and because of when those forms are equally precise. Readers often scan procedures, so unnecessary formal phrasing increases processing time.
Legal and Administrative Writing
Legal and administrative documents may need expressions such as in accordance with, in the event of, on behalf of, and with the exception of because these phrases identify conditions, authority, and exclusions. Even there, defined terms and sentence structure matter more than ceremonial wording.
Conversation and Informal Prose
Everyday speakers commonly use because of, in front of, next to, instead of, and along with. Forms such as prior to and in lieu of sound formal in many conversations, although they remain grammatical.
FAQ About Complex Prepositions
Can a complex preposition begin a sentence?
Yes. A complex prepositional phrase can appear at the beginning of a sentence when its relationship to the main clause is clear: In spite of the setback, the team continued. A comma commonly follows a long introductory phrase, while short phrases may omit it: Because of rain we stayed inside.
Can a complex preposition end a sentence?
Yes. English permits a prepositional phrase at the end: That is the issue we need to talk about. However, a sentence should not end with a preposition merely because a longer complex expression was used. This is the matter with respect to which we need advice is grammatical but usually less direct than This is the matter we need advice about.
Is despite a complex preposition?
No. Despite is a simple, one-word preposition, although it has the same broad contrastive meaning as in spite of. Both can precede a noun phrase or gerund: despite the rain and in spite of the rain. Do not use despite of in standard English.
What is the difference between a preposition and a conjunction?
A preposition introduces a noun-like complement, while a conjunction can introduce a clause. Compare because of the delay, where the delay is a noun phrase, with because the train was delayed, where the train was delayed is a finite clause. The two structures express related cause but require different grammar.
Are in order to and in order that the same?
No. In order to introduces an infinitive phrase: She left early in order to catch the train. In order that introduces a finite clause: She left early in order that her child could rest. The first is an infinitival purpose construction; the second is a subordinating conjunction phrase.
How should complex prepositions be memorized?
Memorize each expression as a complete unit with its meaning, register, and complement pattern. A useful card shows in addition to + noun or gerund, followed by one sentence such as In addition to the fee, the customer paid tax. Practice changing the object while keeping the preposition unchanged.
Conclusion
A complex prepositions definition usage and examples guide is ultimately about recognizing fixed multi-word units and selecting them for accurate relationships. Learn the complete expression, attach a suitable noun phrase or gerund, distinguish prepositions from conjunctions, and replace formal wording when a shorter alternative preserves the meaning. Used deliberately, complex prepositions add precision without forcing unnecessary complexity.
