1.They can't have thought that i was at home then,

1.They can't have thought that i was at home then,B_?(在表示猜测时,反意疑问句中不能用情态动词)
a.did they b.have they c.do they d.was i
2.-He hasn't finished yet.
-well,he ought B_.(强调动作的已经完成,用完成式------he ought to have (finished))
a.not have to b.to have c.not to d.to
3.-i find lily _fatter of the two.--------B
-really?and she is _ shorter of the two.记住：the 最高级of the three,the four,the five,- --
a./,/ b.the,the c./,the d.the,/ the 比较级of the two
4.after the party ,shi found her nacklace gone ,and never_D again.（never found again 习惯用法,再也没有被找到===and was never found again.）
a.be found b.being found c.to found d.found
再问： 错了，第一道。
再答： 请比较和分析 1 she must be at home now, isn't she（现在） 2 she must have seen the film, hasn't she? （到现在为止） 3 she must have seen the film last week, didn't she ? （在过去） 4They can't have thought that i was at home then,_? （can't 指代的是现在，所以是have they?）
再问： haven't they 没有这个选项啊，而且答案是A
再答： 这两句你碰到过吗？ 2 she must have seen the film, hasn't she? （到现在为止） 3 she must have seen the film last week, didn't she ? （在过去） ----she can't have seen the film, has she ? ----- she couldn't have seen the film yesterday,did she? 记住，时间状语决定反义疑问句的时态，如果没有明确的时间状语，就说明是现在时。
再问： 一楼和五楼讲的错在哪
再答： 表示猜测时，时间状语决定反义疑问句的时态，如果没有明确的时间状语，就说明是现在时。你们老师没有告诉你吗？ 1 she must have thought you were there,____________? 请你做！反义疑问句 2 she must have thought about you yeasterday_____________?