English Language & Usage Stack Exchange is a question and answer site for linguists, etymologists, and serious English language enthusiasts. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I know that whenever we use "did" in any sentence, the following verb has to be in present form. But I have a confusion:-
In plain English it should be:- Did you forget switching it off?
But if we jumble up the words, should we write it like this:- Forgot switching it off, did you? or like this:- Forget switching it off, did you?

share|improve this question
up vote 1 down vote accepted

The verb following DO is not in present form but in the infinitive form. (To be sure, this is a rather artificial distinction, since in most cases the two forms are identical; but they are different for one very common verb, BE.)

Accordingly, there's no present form here to confuse you. Forgot is the form you want.

However, in this context forget takes a bare infinitive rather than a gerund, so the expressions you're looking for are:

Did you forget to switch it off?
You forgot to switch it off, didn't you.
Forgot to switch it off, did you?

share|improve this answer
Thank you. I got it now. – xyres Jun 21 '13 at 13:39

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.