1,won't---->wouldn't
2,have---->had
3,pay---->paid
4,doesn't---->didn't
5,won't---->wouldn't
6,have---->had
7,can---->could
8,understand---->understood
1.won't改为wouldn't
2.have改为had
3.pay改为paid
4.doesn't get改为hadn't got
5.didn't drink改为hadn't drunk(后面是wouldn't吧)
6.have改为had
7.can改为could
8.understand改为understood