1.tells --> tell
2.behind --> after
3.have --> haven't
4.since --> for
5.in --> on
6.for --> since
判断是否正确,不正确请改正1.He should tells his mother the truth.2.I am g
for5.in -->"}}}'>
1.tells --> tell
2.behind --> after
3.have --> haven't
4.since --> for
5.in --> on
6.for --> since