Is the below sentence correct?

I will confirm once I’m at the office.

I’m trying to tell someone that I will confirm later because I’m not at the office meanwhile. I could not digest “once” followed by “I’m”. That is why I was confused.

  • 3
    Yes, this is a correct and completely natural expression. However, could you edit your question to add more detail what you find difficult or confusing about this grammar? Otherwise the question may be closed.
    – Andrew
    Jan 19, 2018 at 21:14
  • Could also be "I will confirm once I’m in the office." Jan 19, 2018 at 21:33
  • 1
    @Andrew I could not digest “once” followed by “I’m”. That is why I was confused.
    – shayqi
    Jan 19, 2018 at 23:49
  • regarding @WeatherVane's comment, the choice of at or in would depend on whether you regarded office as simply a room (where in would be appropriate), or as business premises, where at would be appropriate).
    – JavaLatte
    Jan 19, 2018 at 23:52
  • @JavaLatte I work in an open space office so I think “at” would be the write choice. Correct me If I was wrong.
    – shayqi
    Jan 19, 2018 at 23:59

1 Answer 1


In this context, once is acting as a conjunction, which is used to connect two clauses to make a sentence. The two clauses are

I will confirm
I’m at the office.

The two clauses are grammatically correct, and once adds the meaing that the first clause will take place as soon as the second clause occurs.

According to the Cambridge Dictionary, once can be an adverb or a conjunction. The adverbal usage is more common and has a different meaning: maybe that's what is making you uncomfortable about the sentence. You could replace once with the conjunction when, and the meaning would be almost the same, but without the sense of urgency.

I will confirm when I’m at the office.

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