4

Which sentence should I use?

I'll let you know when I have more information.

I'll let you know when I'll have more information.

Also, what is the proper grammatical explanation for the correct version?

  • 2
    "I will let you know when I have more information." is correct. You don't use the future tense in an adverbial clause. – JayHook Jul 30 '13 at 11:55
  • I think this question has been already asked. – kiamlaluno Jul 31 '13 at 0:25
8

Both can be correct, but I would expect that the first version is the one that you would actually want most of the time.

In the first version, "I'll let you know when I have more information", there are two time points. At time T (now) you don't have more information. You are promising that at some time T+1, you will have more information, and at that same time T+1 you will inform them of this information.

In the second version, "I'll let you know when I will have more information", there are three time points. At time T (now) you don't have more information. At some time (T+1) you will have a schedule. This schedule gives a time (T+2) at which you will have more information. You are promising that at time (T+1), when you have the schedule, you will inform them of the schedule.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

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