現(xiàn)在完成時
1、You won't believe what a terrible time we've had herel Everything has gone wrong since __________（Thursday/nearly a week）
2、He hasn't eaten anything for _________（Friday/several days）
3、The weather has been really awful since ________（the weekend/a long time）
4、We'll stay for just _______ （Wednesday/six days）
5、 Getting from Parisl We've been here _________（since/for）the day before yesterday.
6、He and this family have lived here _______（since/for）
7、He says he has only studied French________（since/for）
8、I think he's studied it _________（since/for） a long time.