Question

Tom____the party as no one saw him there yesterday evening

A.can't attend B.mustn't attend C.won't have attended D.couldn't have attended 为什么不能选B呢

Answer 1

选项是D.
B选项的意思是“不准参加”，不符合题意。

Answer 2

A

Modal V.+be表示推测，其中
对过去可能性不大的推测
may have done 可能已经
may have been N./ADJ./ADV. 可能已经是
may have been doing 可能在……

对现在可能性不大的推测
may be +n./adj./adv. 可能是
may be doing 可能在

对现在肯定的推测
must be +n./adj./adv. 一定是
musr be doing 一定在

对现在否定的推测
can't be +n./adj,/adv. 不可能是
can't be doing不可能在

对过去肯定的推测
must have been+n./adj./adv. 一定是
must have been diong 过去一定在……
must have done 过去一定干了

对过去否定的推测
can't have been+n./adj./adv.过去不可能是
can't have been doing 过去在
can't have done过去不可能干了

Answer 3

D,这是对过去肯定的否定，所以要有have，mustn‘t 表示禁止，must 的否定为can't。又是对过去的推测，所以用过去式并且加上have。

Answer 4

mustn't意为禁止去……不可以说因为某人不在就说禁止某人做某事，
can't 不能，客观的来讲，胜于mustn‘t.
故选A

Answer 5

楼主你好。
应选D，因为是昨天晚上发生的事情，应用过去式。