1. Let means allow
Let says that someone could prohibit an action but permits it. Permission can come from a person, such as a trainer, parent or manager, an institution, or circumstances that make something possible. The speaker describes what is permitted through that permission or opportunity.
A sentence with let answers “Was it permitted?” rather than “Who forced it?” or “Who helped?” We only note the contrast with make and help here; their detailed patterns belong to neighbouring rules.
subject + let + object + base form
- subject / S —
- The grammatical subject: who or what the clause is about; the verb agrees with it. In The book was written, the book is the subject, although someone else does the action.
- V1 / base form —
- The base verb without to: work, go, be.
- object / O —
- Who or what an action affects: in I read a book, a book is the object.
The coach lets the players choose their own shirt numbers.
The coach lets the players choose their own shirt numbers.
The coach has the authority to decide but leaves the choice to the players.
Our landlord let us paint the hallway.
Our landlord let us paint the hallway.
Permission in the past: us is the object, and paint is the base form.
My grandmother never lets anyone touch her garden tools.
My grandmother never lets anyone touch her garden tools.
Never lets expresses a standing prohibition through a negative word.
2. After the object, use the base form without to
An object comes between let and the action verb. It can be a noun or an object-form pronoun: me, you, him, her, us, them. I, he, she, we and they are incorrect in this position because let needs an object.
The verb after the object is the base form: no to, -ing, -s or past form. A common error is transferring to from allow or want to let.
let + me/you/him/her/us/them + base verb
- verb / V —
- A word for an action or state, such as work or be. The pattern determines its form.
- V1 / base form —
- The base verb without to: work, go, be.
Mum let my sister pick a book for the trip.
Mum let my sister pick a book for the trip.
The object is the noun phrase my sister, followed by pick without to.
They let us wait inside because of the rain.
They let us wait inside because of the rain.
Object pronoun us, then base-form wait.
Don't let them see the surprise.
Don't let them see the surprise.
A negative command: them is again followed by base-form see.
3. Forms of let and auxiliary support
Let has three identical forms: base let, Past Simple let, and past participle let. In the Present Simple, third-person singular takes -s: lets. Let, or an auxiliary, carries tense; the verb after the object remains in the base form.
Build negatives and questions with do, does, did, or with will for modal/future meanings. The auxiliary carries tense and agreement, so let and the following action verb remain in their base forms: Did the officer let you pass? After prepositional for, use -ing: thanks for letting me know.
do/does/did/will (not) + let + object + base form
- V1 / base form —
- The base verb without to: work, go, be.
- object / O —
- Who or what an action affects: in I read a book, a book is the object.
My sister never lets me read her messages.
My sister never lets me read her messages.
Lets is third-person singular; read has no to.
The hotel won't let guests bring their own food.
The hotel won't let guests bring their own food.
Won’t let: the modal is followed by base-form let.
Did the manager let you change the date?
Did the manager let you change the date?
Did carries past tense, so let and change have no added endings.
Thanks for letting me know.
Thanks for letting me know.
Letting me know uses -ing after for, but me is still followed by base-form know.
4. The passive: be allowed to
For an ordinary passive report of permission, use be allowed to, not was let to: I was allowed to leave. Do not extend this to every use of let: the established expression He was let go, meaning released or dismissed, is correct.
Be allowed to requires to before the base form. Compare a present rule: They let us park here → We are allowed to park here. Add by if the person granting permission matters; often it is unnecessary.
subject + be (not) allowed to + base verb
- subject / S —
- The grammatical subject: who or what the clause is about; the verb agrees with it. In The book was written, the book is the subject, although someone else does the action.
- verb / V —
- A word for an action or state, such as work or be. The pattern determines its form.
- V1 / base form —
- The base verb without to: work, go, be.
Pupils are allowed to use the library after school.
Pupils are allowed to use the library after school.
A rule without a named person granting permission.
Children weren't allowed to run in the corridor.
Children weren't allowed to run in the corridor.
A past negative passive, with to before the base form.
Are we allowed to sit here?
Are we allowed to sit here?
In the question, be moves before the subject.
5. Let, allow and permit
Let, allow and permit are close in meaning but have different patterns. After allow and permit, to connects the object to the base form: allow someone to do. After let, there is no to.
Let is common in conversation, allow is neutral, and permit often sounds official. For standard passive permission, choose allowed or permitted with to. Fixed uses of let, such as was let go, follow a different pattern.
allow/permit + object + to + base verb | let + object + base verb
- verb / V —
- A word for an action or state, such as work or be. The pattern determines its form.
- V1 / base form —
- The base verb without to: work, go, be.
- object / O —
- Who or what an action affects: in I read a book, a book is the object.
The rules allow guests to use the pool until ten.
The rules allow guests to use the pool until ten.
Allow + object + to + base form.
Our contract permits employees to work remotely.
Our contract permits employees to work remotely.
Permit is the formal alternative with to.
The rules let guests use the pool until ten.
The rules let guests use the pool until ten.
The same meaning with let: no to, and a more conversational tone.
6. Let alongside make, help and fixed expressions
Make expresses compulsion; help expresses assistance: She made me wait gives no choice, She let me wait grants permission, and She helped me find the room provides assistance. Make and help have separate lessons; here the focus is recognising the meaning difference.
Let me know, let me see and let me try are established expressions with the same pattern: let + me + base form. Other uses are separate: Let’s go is a suggestion; let go of means release; let down means disappoint; let a flat means rent it out.
She made me wait outside, but her brother let me come in.
She made me wait outside, but her brother let me come in.
Make expresses compulsion; let expresses permission.
Please let me know if the time changes.
Please let me know if the time changes.
An established expression: let + me + know.
Let's meet at six.
Let's meet at six.
Let’s, from let us, makes a suggestion, which is a different function.
7. Longer sentences and an omitted action verb
In a longer sentence, let can follow other words: I asked the office to let me work from another desk; She hopes her parents will let her take the car. After to, will, would, can’t or won’t, let stays in the base form, as does the action verb after the object.
If the action has already been named, it can be omitted: I wanted to stay longer, but the guard wouldn’t let me. For an ordinary passive report, say I wasn’t allowed to stay longer.
I asked the office to let me work from another desk.
I asked the office to let me work from another desk.
To belongs to asked … to; after let me, use work.
She hopes her parents will let her take the car.
She hopes her parents will let her take the car.
Will let: modal verb + base form.
I wanted to stay longer, but the guard wouldn't let me.
I wanted to stay longer, but the guard wouldn't let me.
Stay is omitted because the action has already been mentioned.
Common mistakes
Incorrect:The manager let us to finish early.
Correct:The manager let us finish early.
Do not use to after let + object. Avoid transferring the pattern from allow or want.
Incorrect:My landlord lets me keeping a cat.
Correct:My landlord lets me keep a cat.
The object must be followed by the base form, not -ing.
Incorrect:Their parents don't let they stay up late.
Correct:Their parents don't let them stay up late.
Let takes an object, so use them, not they.
Incorrect:Did your dad let you drove his car?
Correct:Did your dad let you drive his car?
Did already carries past tense. After let + you, use base-form drive.
Incorrect:She was let to enter the building.
Correct:She was allowed to enter the building.
This standard report of permission requires was allowed to enter. Was let to enter is not the correct passive pattern.
Incorrect:We were allowed use the pool.
Correct:We were allowed to use the pool.
Unlike let, passive allowed requires to.