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'Let' means to allow; 'leave' means to go away from somewhere, or to put something down and not take it with you.
Side-by-side comparison
To allow, to give permission for something to happen. Structure: let + object + bare infinitive.
Let me help you with those bags. They look heavy.
Her parents let her stay out until midnight on weekends.
Let the dough rest for thirty minutes before baking.
To depart from a place. Or: to leave something/someone in a place. Or: to abandon.
She leaves for work at seven every morning.
He left his wallet on the kitchen counter again.
Please do not leave me alone here. I am afraid.
Common mistake
- •"Leave me do it" does not exist: to give permission it is always "let me do it".
- •And "Let your keys on the table" does not exist either: to leave something in a place it is always "leave your keys on the table".
Trick to remember it
- •Test: can you replace it with "to permit"? "Let".
- •Can you replace it with "to depart" or "to leave something somewhere"? "Leave".
- •Key "let" structure: always object + bare infinitive.
Quick rule
- •"Let" + person + bare infinitive = allow someone to do something.
- •"Leave" = depart or leave something/someone in a place.
Did you know?
"Let It Be" and "Leave It Be" are expressions with subtly different meanings. "Let it be" (allow it to be as it is) conveys philosophical acceptance, serenity, and non-interference, the spirit of the famous Beatles song. "Leave it be" (leave it alone, don't touch it) has a more practical tone: do not interfere with this, leave it as it is. "Leave me alone" is much more direct and sometimes aggressive than "let me be" (let me exist, don't bother me), which sounds more philosophical and resigned.
Practise what you learned
Exercise 1 · Pick the right one
Please _____ me finish my sentence! You keep interrupting.
Exercise 2 · Pick the right one
Just _____ it alone. Stop touching it — you'll make it worse.
Exercise 3 · Form the word
Related word pairs
"Let" is to permit casually or personally; "allow" is to permit formally or with authority.
'Let alone' reinforces a negation with something even more extreme; 'not to mention' adds emphatic elements.
They look similar but mean very different things and are pronounced differently.
Causative verbs have fixed structures: 'make/let' + bare infinitive; 'get/allow' + 'to' + infinitive.
Bryan López
Founder of SpeakUP Academy