The correct past tense of let is let. The verb let is an irregular, zero-change verb, so its base form, past tense, and past participle are all spelled let. Lets is present tense for he, she, or it; let’s means let us; and letted is not the standard modern past-tense form.
Key Facts at a Glance
- Let is the correct past tense: “She let me leave early.”
- Let is also the past participle: “They have let the dog outside.”
- Lets is present tense with a third-person singular subject: “He lets us use the equipment.”
- Let’s is a contraction of let us: “Let’s begin the meeting.”
- Letted is not used as the ordinary past tense in standard modern English.
- Letting is the present participle and gerund, formed by doubling the final t.
What Is the Correct Past Tense of Let?
The correct past tense of let is let, with no spelling change. For example, “Yesterday, the teacher let the students leave early” is correct, while “Yesterday, the teacher letted the students leave early” is not standard modern English.
The verb let means to allow or permit someone to do something. It can also mean to release, rent out, or cause something to happen in certain constructions. The meaning may change, but the past-tense spelling remains the same.
| Verb form | Spelling | Example |
|---|---|---|
| Base form | let | “I let the dog out.” |
| Third-person present | lets | “She lets the dog out.” |
| Past tense | let | “She let the dog out.” |
| Past participle | let | “She has let the dog out.” |
| Present participle | letting | “She is letting the dog out.” |
The identical forms can initially seem unusual because many English verbs add -ed, as in walk/walked or permit/permitted. English also contains several zero-change verbs, including put, hit, cut, set, and cost.
Why Does Let Stay the Same in the Past Tense?
Let stays the same because it is an irregular verb whose past form developed without an added -ed ending. Grammarians may call verbs with unchanged base and past forms invariable verbs, zero-change verbs, or zero-inflection verbs.
The spelling does not indicate the tense by itself. The subject, auxiliary verbs, and time expressions provide the grammatical information.
Compare these examples:
- Present habit: “I let the cat outside every morning.”
- Completed past action: “I let the cat outside this morning.”
- Present perfect: “I have let the cat outside already.”
- Past perfect: “I had let the cat outside before breakfast.”
The word let remains unchanged in all four sentences. The time phrase or auxiliary verb identifies the timeline.
Which Subjects Use Let in the Past?
Every grammatical subject uses let in the simple past. English does not add -s for he, she, or it after the verb moves into the past tense.
| Subject | Correct past form | Example |
|---|---|---|
| I | let | “I let him enter.” |
| You | let | “You let them decide.” |
| He | let | “He let us wait.” |
| She | let | “She let the bird fly away.” |
| It | let | “It let water into the basement.” |
| We | let | “We let the children choose.” |
| They | let | “They let me explain.” |
A common error is transferring the present-tense ending into a past sentence: “He lets me leave yesterday.” The corrected version is “He let me leave yesterday.”
What Is the Difference Between Let, Lets, and Let’s?
Let can be the base form or the past tense, lets is the third-person singular present form, and let’s is a contraction meaning let us. The apostrophe in let’s changes the grammatical function, not merely the appearance.
| Form | Grammatical role | Correct example | Meaning |
|---|---|---|---|
| let | Base verb | “Let him speak.” | Allow or permit |
| let | Simple past | “She let him speak.” | Allowed in the past |
| lets | Present verb | “She lets him speak.” | Allows now or habitually |
| let’s | Contraction | “Let’s speak privately.” | Let us speak |
| letted | Nonstandard past form | “She letted him speak.” | Avoid in standard English |
When Should You Use Lets?
Use lets only with a singular third-person subject in the present tense. The form describes a current habit, general rule, or repeated action.
Examples include:
- “The software lets users export a PDF.”
- “My landlord lets me keep a bicycle indoors.”
- “The coach lets the players choose their positions.”
- “This key lets the operator open the control panel.”
Do not use lets after did, does, or a modal auxiliary. The auxiliary carries the tense or agreement, so the main verb returns to its base form:
- Correct: “Did she let you enter?”
- Incorrect: “Did she lets you enter?”
- Correct: “He does let visitors use the lounge.”
- Correct: “The policy will let employees work remotely.”
When Should You Use Let’s?
Use let’s when the speaker proposes an action involving the speaker and at least one other person. It is short for let us in ordinary suggestions.
Examples:
- “Let’s check the figures again.”
- “Let’s meet at 3 p.m.”
- “Let’s not change the schedule.”
- “Let’s see whether the replacement works.”
The contraction does not express past time. “Let’s review what happened yesterday” is grammatically correct because the reviewing happens now, even though the subject matter concerns yesterday.
The uncontracted phrase let us can have two meanings. “Let us leave” may mean “Allow us to leave,” while “Let’s leave” normally means “We should leave.”
Is Letted Ever Correct?
Letted is not the standard modern English past tense of let. Historical texts, dialect writing, and a few specialized contexts may contain letted, but those appearances do not make letted appropriate for ordinary contemporary writing.
Older English sometimes formed past verbs differently from modern standard English. In addition, specialist vocabulary can preserve unusual forms. For example, legal, commercial, or historical texts may use let in the sense of renting property, and older documents may show forms that modern editors would replace.
| Context | Recommended form | Example |
|---|---|---|
| Everyday permission | let | “They let us enter.” |
| Formal business writing | let | “The owner let the premises.” |
| Modern fiction dialogue | let | “She let him go.” |
| Historical quotation | Preserve source wording if required | “[Original historical wording]” |
| Standard school or workplace writing | let | “The manager let the team leave.” |
A spellchecker may flag letted, but the underlying reason is grammatical rather than merely stylistic: standard English uses the unchanged form let.
How Do You Form Questions and Negatives with Let?
Questions and negatives in the simple past use did or did not, followed by the base form let. The auxiliary did marks the past tense, so let does not change.
| Sentence type | Correct structure | Example |
|---|---|---|
| Statement | Subject + let | “Maya let him stay.” |
| Question | Did + subject + let | “Did Maya let him stay?” |
| Negative | Subject + did not + let | “Maya did not let him stay.” |
| Short negative | Subject + didn’t + let | “Maya didn’t let him stay.” |
| Wh-question | Why + did + subject + let | “Why did Maya let him stay?” |
“Did she let you leave?” is correct. “Did she let you left?” is incorrect because let takes a bare infinitive after it, and leave is the base form of the second verb.
The same pattern applies to related verbs:
- “Did he put the files away?”
- “Did she set the alarm?”
- “Did they hit the target?”
What Verb Forms Follow Let?
The usual permission construction is let + object + base verb. Standard English normally does not use to between the object and the following verb.
Correct examples:
- “Let me explain.”
- “The guard let us pass.”
- “Her parents let her drive.”
- “The settings let users customize the display.”
Incorrect or nonstandard in this construction:
- “Let me to explain.”
- “The guard let us to pass.”
- “Her parents let her to drive.”
The passive equivalent generally uses be allowed to, not a direct passive form of let. English speakers say “We were allowed to leave,” rather than the uncommon and awkward “We were let to leave.”
| Active construction | Natural passive alternative |
|---|---|
| “The teacher let us go.” | “We were allowed to go.” |
| “The system lets users edit files.” | “Users are allowed to edit files.” |
| “The manager let her work remotely.” | “She was allowed to work remotely.” |
| “The rule lets members vote.” | “Members are permitted to vote.” |
This distinction matters because let has a short, distinctive complement pattern. Substituting allow can require the word to: “The teacher allowed us to go.”
What Are the Main Meanings of Let?
The verb let commonly expresses permission, release, rental, or a request for someone to accept an idea. The grammatical form remains let in the past regardless of which meaning applies.
| Meaning | Present example | Past example |
|---|---|---|
| Permit | “They let visitors enter.” | “They let visitors enter yesterday.” |
| Release | “Let the rope go.” | “She let the rope go.” |
| Rent out | “The owner lets rooms.” | “The owner let the rooms last year.” |
| Allow to happen | “Do not let it fail.” | “They did not let it fail.” |
| Suggest jointly | “Let’s compare prices.” | “We suggested comparing prices.” |
In British English, let frequently means rent out: “The agency lets apartments in London.” The past form is still let: “The agency let the apartment to a student.”
The phrase let alone has a separate rhetorical use meaning “much less” or “not to mention.” For example, “He cannot afford a bicycle, let alone a car.” This expression does not create a different past-tense form.
How Does Let Compare with Other Zero-Change Verbs?
Let belongs with verbs whose simple past has the same spelling as the base form. Memorizing the group helps learners avoid adding -ed automatically.
| Base verb | Past tense | Past participle | Correct past example |
|---|---|---|---|
| let | let | let | “She let me choose.” |
| put | put | put | “He put the book down.” |
| hit | hit | hit | “The ball hit the wall.” |
| cut | cut | cut | “They cut the cable.” |
| set | set | set | “We set the timer.” |
| cost | cost | cost | “The repair cost $80.” |
These verbs do not all behave identically in every construction. Let, put, and make often take an object plus a base verb, while cost normally expresses price. The shared feature is the unchanged past spelling.
A useful editing rule is simple: if a sentence contains a completed action and the verb is let, use let, never letted.
How Can You Make a Sentence with Let Clear?
Time markers resolve ambiguity when the present and past forms look identical. Add a specific expression such as yesterday, last week, earlier, every day, or usually when the surrounding context does not establish the timeline.
| Potentially unclear sentence | Clear past version | Clear present version |
|---|---|---|
| “I let him in.” | “I let him in at 8:15 yesterday.” | “I let him in every morning.” |
| “She let the dog out.” | “She let the dog out before lunch.” | “She lets the dog out before lunch.” |
| “They let us use it.” | “They let us use it during last year’s audit.” | “They let us use it whenever necessary.” |
| “He let the contract expire.” | “He let the contract expire in June.” | “He lets contracts expire without review.” |
Context often makes the tense obvious, so adding a time phrase is not mandatory. In professional writing, however, a concrete date or time improves legal, financial, and operational accuracy.
What Is the Best Editing Test?
Replace the sentence with a clearly regular verb and inspect the timeline, then restore let without adding -ed. For example, “Yesterday, she allowed us to leave” corresponds to “Yesterday, she let us leave,” not “Yesterday, she letted us leave.”
Check four features:
- Identify whether the action is present, past, or perfect.
- Check whether the subject is he, she, or it in the present.
- Look for did, has, have, had, or a modal auxiliary.
- Confirm that the following verb after let + object uses its base form.
This procedure catches the most frequent learner errors without relying on pronunciation.
What Does Let Sound Like?
Let is pronounced /let/, with one syllable and the vowel sound found in bed. Lets is pronounced /lets/, with a final /s/ sound, while let’s has the same pronunciation as lets.
The apostrophe cannot be heard. Writers must identify the grammatical role from the sentence:
- “He lets us leave” uses the present-tense verb.
- “Let’s leave” uses the contraction.
- “He let us leave” uses the past-tense verb.
Pronunciation therefore cannot distinguish lets from let’s. Spelling, subject, and sentence structure do that work.
What Are the Most Common Errors with Let?
The most common errors are writing letted for the past, using lets after did, confusing lets with let’s, and inserting to after let + object. Each mistake has a specific correction pattern.
| Error | Correction | Reason |
|---|---|---|
| “She letted me go.” | “She let me go.” | Let has a zero-change past |
| “Did he lets you enter?” | “Did he let you enter?” | Did takes the base form |
| “The boss let’s us leave.” | “The boss lets us leave.” | No apostrophe in the present verb |
| “Lets go now.” | “Let’s go now.” | Suggestion requires let us |
| “They let us to stay.” | “They let us stay.” | Let takes a bare infinitive |
| “He let me left.” | “He let me leave.” | The second verb stays in base form |
One counterintuitive point matters in proofreading: let’s can appear in a sentence about the past without being a past form. “Let’s discuss what she let us do yesterday” contains present-time let’s and past-tense let in the same sentence.
Is Let Formal or Informal?
Let is grammatically standard in formal and informal English, but some meanings and alternatives differ by register. In formal policy writing, permit or allow may sound more precise, while let is usually shorter and more natural in conversation.
| Intended register | Preferred wording | Example |
|---|---|---|
| Conversation | let | “She let me borrow it.” |
| General workplace writing | allow or let | “The policy lets staff work remotely.” |
| Legal or regulatory text | permit | “The license permits operation.” |
| Academic explanation | allow | “The method allows comparison.” |
| Property rental, British usage | let | “The company lets commercial units.” |
Replacing every instance of let with allow can make prose unnecessarily formal. The choice depends on the audience, the meaning, and whether the sentence needs to after the object.
When Is Let Ambiguous or Problematic?
Let becomes ambiguous when no time expression, auxiliary, or broader context identifies when the action occurred. The ambiguity is grammatical rather than an error because English deliberately gives the base and past forms the same spelling.
For example, “The technician let the machine run” could describe a past decision or a recurring operating practice. A report should specify “The technician let the machine run for 20 minutes” or “The technician lets the machine run during calibration.”
The verb also creates ambiguity in rental contexts. “The owner let the house” usually means rented it out in British English, while an American reader may initially interpret let as permission. A surrounding noun such as tenant, lease, or rent resolves the meaning.
What Should Editors Do in Technical Reports?
Editors should add dates, durations, or conditions when a zero-change verb affects responsibility or sequence. “The operator let the valve remain open” is less precise than “The operator let the valve remain open from 09:00 to 09:20.”
Do not change let to letted to make the past tense visible. Use a time marker, a perfect construction, or a clearer alternative:
- “The operator had allowed the valve to remain open.”
- “At 09:00, the operator let the valve remain open.”
- “The valve remained open after the operator’s decision.”
How Do Let and Allow Differ?
Let and allow both express permission, but let normally takes object + base verb, whereas allow normally takes object + to-infinitive. The two verbs are close in meaning, but their complement structures are not interchangeable.
| Verb | Pattern | Example | Register |
|---|---|---|---|
| let | let + object + base verb | “They let us leave.” | Neutral, concise |
| allow | allow + object + to + verb | “They allowed us to leave.” | Neutral to formal |
| permit | permit + object + to + verb | “They permitted us to leave.” | Formal or regulatory |
| enable | enable + object + to + verb | “The update enabled users to export.” | Ability or capability |
Allow can emphasize permission, while enable often emphasizes making an action possible. “The key enabled access” does not necessarily mean a person granted permission.
FAQ
Is “I letted him go” ever acceptable?
“I letted him go” is not acceptable in standard modern English. The correct sentence is “I let him go.” A historical text, dialect quotation, or deliberately archaic piece may preserve letted, but ordinary school, workplace, academic, and professional writing should use let.
What is the third form of let?
The past participle, often called the third principal part, is let. The three principal forms are let, let, let: base form, simple past, and past participle. For example, “They have let the issue continue” uses let as a past participle after have.
Is “let” an irregular verb?
Yes. Let is an irregular verb because it does not form its past tense by adding the regular -ed ending. More specifically, let is a zero-change or invariable verb because its base, past, and past-participle spellings are identical.
Should I write “let’s” or “lets” in “The rule lets us enter”?
Write lets, without an apostrophe, because lets is the present-tense verb agreeing with the singular subject the rule. The sentence means that the rule permits entry. Let’s would mean let us and would not fit that subject-verb structure.
Why is “letting” spelled with two ts?
The spelling letting doubles the final t before adding -ing. The doubled consonant preserves the short vowel sound in let. The same spelling principle appears in sit/sitting and run/running, although individual spelling rules depend on the word’s pronunciation and structure.
Can I use “let” for both present and past time?
Yes. Let is used for the base form and the simple past, so context identifies the tense. “I let the dog out every morning” describes a present habit, while “I let the dog out at 7 a.m. yesterday” describes a completed past action.
The Bottom Line
The correct answer to “lets let or letted which is the correct past tense of let” is let. Use let for every subject in the simple past and as the past participle, use lets only for singular third-person present subjects, use let’s for let us, and avoid letted in standard modern English.
