1.They can't have thought that i was at home then,a.did they b.have they c.do they d.was i2.-He hasn't finished yet.-well,he ought_.a.not have to b.to have c.not to d.to3.-i find lily _fatter of the two.-really?and she is _ shorter of the two.a./,/ b

1.They can't have thought that i was at home then,a.did they b.have they c.do they d.was i2.-He hasn't finished yet.-well,he ought_.a.not have to b.to have c.not to d.to3.-i find lily _fatter of the two.-really?and she is _ shorter of the two.a./,/ b
1.They can't have thought that i was at home then,
a.did they b.have they c.do they d.was i
2.-He hasn't finished yet.
-well,he ought_.
a.not have to b.to have c.not to d.to
3.-i find lily _fatter of the two.
-really?and she is _ shorter of the two.
a./,/ b.the,the c./,the d.the,/
4.after the party ,shi found her nacklace gone ,and never_again.
a.be found b.being found c.to found d.found
第一题,have thought否定应该是haven't thought .本来是否定的,所以不是应该用have they吗?
其它几道题目要选择的理由.

1.They can't have thought that i was at home then,a.did they b.have they c.do they d.was i2.-He hasn't finished yet.-well,he ought_.a.not have to b.to have c.not to d.to3.-i find lily _fatter of the two.-really?and she is _ shorter of the two.a./,/ b
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

ABBD
第一题的话can't have thought 才是关键，意思是不可能，是一个词组表猜测，时态应该是表示过去所以用did
第二题的话意思是：他现在还没完成，然后回答是他本应该已经完成的，所以排除A、C，如果选B
第三题表示特定，两者之中的一个
第四条的话意思是从来没有被找到，项链是被找到的，所以应该是被动。
我也不确定答案是不是正确，你如果有答案，...

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ABBD
第一题的话can't have thought 才是关键，意思是不可能，是一个词组表猜测，时态应该是表示过去所以用did
第二题的话意思是：他现在还没完成，然后回答是他本应该已经完成的，所以排除A、C，如果选B
第三题表示特定，两者之中的一个
第四条的话意思是从来没有被找到，项链是被找到的，所以应该是被动。
我也不确定答案是不是正确，你如果有答案，可以看一下哪些不对我再想想。
不懂再问我，很乐意回答英语方面的问题。

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1表示否定猜测,按时态,反在主句上A
2B
3B
4D答案我有。。。要理由，谢谢！2ought to=should so..should have done=ought to have done 3感觉考的是特指和泛指 4非谓语的用法1.4能否详解？ 反在主句上不是CAN THEY吗？ 非谓语用法这算那一种。1肯定,否定,疑问猜测的反意疑问要考虑语境即时...

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1表示否定猜测,按时态,反在主句上A
2B
3B
4D

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CBBD吧。
第一题是他们现在对过去的推测，所以要用现在时。错一道。是ABBD吗？摁，。第一题， 对这种情态动词+have+done表示推测的不用情态动词提问，应用助动词。 第四题， 只有是过去分词作状语，而being done表示正在被，此句无此意，因此直接用found. 如果有的话to be found也行...

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CBBD吧。
第一题是他们现在对过去的推测，所以要用现在时。

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1.a2.b3.b 4.d
1.情态动词+have done 是对过去的推测，前否定，后肯定，因此选a
2.指过去（说话前）应该完成，所以ought to have
3.“（两者中）比较.......的一个”，要特指 所以都用the
4,find 与其逻辑主语the necklace 是被动关系， 因此用过去分词表被动.“前否定，后肯定，因此选a"why？陈述部...

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1.a2.b3.b 4.d
1.情态动词+have done 是对过去的推测，前否定，后肯定，因此选a
2.指过去（说话前）应该完成，所以ought to have
3.“（两者中）比较.......的一个”，要特指 所以都用the
4,find 与其逻辑主语the necklace 是被动关系， 因此用过去分词表被动.

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