What is smallest sentence in English?

The answer is Go because it has an implied you in front of it. Only commands can have an implied you and no is not a command. So basically the whole sentence is (You) Go.

---------------------------------------------------------------------------------------------------------------

There are several one-Word sentences in English that immediately come to mind. So if you mean shortest as in the nomber of sords, there are quite a few. For example:

Why?

Yes.

Stop.

Please.

Nine o'clock.

Okay.

Hurry!

I am.

But if you mean the shortest as in the least amount of letters used, the shortest I can think of is No.

(As in:

"Do you want rat poison, cyanide, or glass shards in your caviar this evening, madam?" said the crazy cook.

"No." Although she knew she had poor hearing and was all too aware that her memory was not as clear as it used to be, she had no difficulty in answering that question.)

I hope that helps.

Hi