After an hour & in an hour
We use these sentences to talk about the time in the future when we are going to do something.
We will leave after an hour: the speaker here is planning how long to stay in place before they get there.
We will leave in an hour: the speaker here is already at the place, and is deciding how much longer to stay there.
We use these sentences to talk about the time in the future when we are going to do something.
We will leave after an hour: the speaker here is planning how long to stay in place before they get there.
We will leave in an hour: the speaker here is already at the place, and is deciding how much longer to stay there.