I would like to know when to use in the end or at the end. E.g In/at the end of the trip, the class?
I would like to know when to use arrive at and arrive to. E.g Arrive at/to the concert?
Are these sentences correct?
-My mother bought for us the tickets / my mother bought the tickets for us
-We were/got stuck in the traffic
-We were/got in a gridlock
-We started to run for arriving on time
-Is it possible to say prinicipal roar or should be main road?