- let
- leave, letLeave is well on its way to forcing out let in certain idiomatic uses, especially in leave / let be (Will you leave / let me be? I'm trying to work), leave / let go (Please leave / let go of the handle), and above all in leave / let alone when it means ‘to refrain from disturbing, not interfere with’ (I'll leave / let you alone to get on with it now). Leave alone is the only possibility when the meaning is ‘not to have dealings with’ (I wish you'd leave the matter alone), and let alone is still dominant in the meaning ‘still less, not to mention’ (They never buy a newspaper, let alone read one).————————let1. A pronoun that follows let in exhortations should be in the objective case (me, him, her, etc.) and not the subjective (I, he, she, etc.), since it is the object of let. Mistakes occur most often when there are two pronouns joined by and or when the pronoun is followed by a clause with who: ☒ Let you and I say a few words about this unfortunate affair (read Let you and me…) / Let he who did this be severely punished (read Let him who…).2. The type let us (or let's) + infinitive is well established in English
• (Let's hold more chat —Shakespeare, 1588).
More colloquial forms occur, especially in AmE:• Let's you and me duck out of here —J. Macdonald, 1950
but these are considered non-standard. When let is used to introduce a firm request, rather than a casual suggestion, the two words should be written separately: Let us try once more.3. The negative form of let's is let's not or (in BrE) don't let's. In AmE, let's don't is used informally.
Modern English usage. 2014.