Three police officers are searching the offices in the hall. When/As they are done, they head for a door marked 'cafeteria'.

Hi. I can't figure out if both 'as' and 'when' would be correct here or only one of them. Could you please enlighten me? Thank you in advance.

  • 1
    When they are done implies after they have finished searching. As they are done is less likely, but it could mean because they have finished. Jul 29, 2021 at 13:01

1 Answer 1


In this context 'as' fuctions as 'because'.

As you are so excited, I would like to give you an opportunity to participate in this job.

This is different from the continuous form of 'when'.

As they finish their lunch, they pay the bill and walk out the restaurant.

You would have to use 'when' here.

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