作业帮几道选择题,对选择理由请稍作解释There is a police car in front of his house,what do you suppose______to him?A. happens B.has happenedThe water will be further polluted unless some firm measures______A. will be taken B.are taken C. wer
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几道选择题,对选择理由请稍作解释There is a police car in front of his house,what do you suppose______to him?A. happens B.has happenedThe water will be further polluted unless some firm measures______A. will be taken B.are taken C. wer
几道选择题,对选择理由请稍作解释
There is a police car in front of his house,what do you suppose______to him?
A. happens B.has happened
The water will be further polluted unless some firm measures______
A. will be taken B.are taken C. were taken D.had been taken
No permission_____for anybody to enter the building.
A.has been given B.was given c. will give D. is giving
We______the star for an hour,but he ______ yet.
A. have waited for;hasn't come B.have waited for;doesn't come C.have been waited for;doesn't come D.have been waiting for;doesn't come
最后一题的最后一个选项应该是 D.have been waiting for;hasn't come
几道选择题,对选择理由请稍作解释There is a police car in front of his house,what do you suppose______to him?A. happens B.has happenedThe water will be further polluted unless some firm measures______A. will be taken B.are taken C. wer
B.has happened
现在完成时,强调他发生了什么
B.are taken
unless引导的句子中,主句用一般将来时,从句用一般现在时表将来
A.has been given
强调到目前为止,没有.
D.have been waiting for;hasn't come
have been waiting 现在完成进行时,表示过去一直在等,到现在,有可能还要继续等下去
1B 2B 3C 4D
1、选B There is a police car in front of his house是发生的事情对现在造成的影响，由于事情已经发生了，所以用现在完成时。故选B
2、选B unless 是“除非”的意思，引导的是条件状语从句，应该是主将从现，主句的将来时已由will确定，从句用一般现在时。故选B
3、选B 根据句意可知，句子的时态为过去式故选B
4、选A for ...
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1、选B There is a police car in front of his house是发生的事情对现在造成的影响，由于事情已经发生了，所以用现在完成时。故选B
2、选B unless 是“除非”的意思，引导的是条件状语从句，应该是主将从现，主句的将来时已由will确定，从句用一般现在时。故选B
3、选B 根据句意可知，句子的时态为过去式故选B
4、选A for an hour是一段时间，所以所用的动词应为延续性动词，yet表示这句话的时态为现在完成时。故选A
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