preposition
1
BAD : I always have a good breakfast at the morning.
GOOD : I always have a good breakfast in the morning.
BAD : At afternoon I visited the Fitzwilliam Museum.
GOOD : In the afternoon I visited the Fitzwilliam Museum.
2
BAD : In Germany we have a lot of snow at wintertime.
GOOD : In Germany we have a lot of snow in wintertime.
BAD : I was married at 1989 and have two children, a boy and a girl.
GOOD : I was married in 1989 and have two children, a boy and a girl.
3
BAD : I bought the tape just a week ago, at 4th December.
GOOD : I bought the tape just a week ago, on 4th December.
BAD : We were all very tired at the last day of our journey.
GOOD : We were all very tired on the last day of our journey.