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1,--Today,are you free now I have a favor to ask of you.

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1,--Today,are you free now I have a favor to ask of you.
--_____
A It is a pleasure B Go ahead C Help yourself D Ask,please
2,Had it been at all possible I would have gone to visit him in the hospital,but I ___fully occupied the whole of last week.
A am B was C have been D were
3,It was already past midnight and only three young men ___ in the tea house.
A left B remained C delayed D deserted
第一题为什么不选D,ask of 怎么理解
第二题中的Had it been at all possible 怎么理解 做什么成分
第三题中的选项A 也有剩下的意思为什么不选A
1,--Today,are you free now I have a favor to ask of you.
1.第一题楼上正解,不再赘述.
另:Go ahead.“说吧”
2.答案:B.
1) Had I been at all possible = If I had been at all possible
这是if引导的条件状语从句的倒装用法(if同时要被省略).
因为是对过去动作的虚拟,所以从句用过去完成时,主句用“would/might/might have done sth”结构作谓语.
倒装即可把从句的had/should/were提前至if从句句首,再省略if.
2)该题but后面是实际的过去的情况,所以不用虚拟语气,且时态只能使用一般过去时(由时间状语the whole of last week所决定).
3.B
原因很简单,leave/remain都要“留下”之意,但是remain是不及物动词,没有被动语态;而leave是及物动词,在此题中必须使用被动语态,因为leave的宾语就是句子的主语three young men.
再如:the remaing 5 minutes 剩下的5分钟(remain无被动,所以用其现在分词做定语);
There is only one minute left.只剩下1分钟了.(leave用被动,做后置定语).