1 to smoke a lot a year ago
2 went to school
3 did you last see Tom
4 you kept silent in the classroom
5 he didn't have to work hard for the exam
6 we didn't need to clean all the plates after dinner
7 didn't come to class late
8 he could come here
9 to go to Vung Tau at weekends
10 she were here
1John used to smoke a lot
2went to school
3did you last see Tom?
4you kept silent in the classroom 5he didn't have to work hard for the exam 6we didn't need to clean all the plates after dinner 7didn't come to class late 8he could come here 9to go to VT at weekends 10 she were here
