How do we know when to use at and in?
which is correct?
when we are at school.
when we are in the school.
what do you mean by these sentences:Why is in used in the first and on in the second sentence.pls explain.
I arrived just in time for the flight.
It left exactly on time.
I'd use 'at school'. We generally use 'at' for general locations and 'in for more specific ones- at school, in the classroom.
On time = the correct scheduled time
in time = you managed to get there, but had to rush as you thought you were going to be late