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I have been reading conversations like the following:

Person 1: Hey, let's go for a jog this afternoon!
Person 2: Let's!

Is it correct to only say "Let's!" instead of "Let's go!"?

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instead of repeating "go", a person can say Let's for short. –  thanh tran Nov 14 '11 at 6:42
    
@thanhtran what if the question is "Do you want to have lunch with me?" and the reply is "Let's." Is it correct? –  patrickeatworld Nov 14 '11 at 6:46
    
@patrickeatworld I use that expression regularly, though it may be seen as somewhat pompous ;) –  msanford Nov 14 '11 at 22:35
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@msanford haha i need to get used to it! –  patrickeatworld Nov 15 '11 at 4:37
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@patrickeatworld I would add that if I do use that expression, I almost never use it in isolation, but rather say "Yes, let's!" (or some equivalent). –  msanford Nov 15 '11 at 16:20

3 Answers 3

up vote 2 down vote accepted

Yes.

Answers to questions often omit words which would be repeated from the question:

“Did you do the dishes?” “Yes, I did [do the dishes].”

The response “Let’s!” is a grammatically quite standard example of this, and it can mean other things beside “Let’s go”:

“Do you want to see a film tonight?” “Yes, let’s [see a film tonight].”

Depending on where you live and whom you talk to, though, “Let’s!” on its own may be more or less idiomatic than “Let’s go!” or other similar answers. To my ear, “Let’s!” alone seems a bit unusually curt; but “Yes, let’s!” or “Do let’s.” are both quite normal (the latter being perhaps more old-fashioned and more BrE).

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Let's being a contraction for let us, responding "Let's!" to the suggestion to jog is properly informal and conversational.

(Responding with "Let us!" sounds like you're asking permission.)

There's nothing wrong with answering "Let's go!" but it's not necessary, unless Person 2 perhaps wishes to imply "Right now!"

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Ah yes, I agree that responding with "Let us!" sounds like I am asking permission. I guess I am just not used to hearing people responding a question with only "Let's!". –  patrickeatworld Nov 15 '11 at 2:27

It's a common enough expression, but more likely, I'd have thought, to occur as Yeh, let's.

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