英语虚拟语气题3.If he _________ me tomorrow,I would let him know.A.should call B.should not have been able C.were not able D.are not able 为什么选A呢?7.Had Paul received six more votes in the last election,he ____________our chairman now.A.must have been B.would have been C.were D.would be 这道题为什么选D？

1 A 虚拟语气将来式. 表与将来情形相反的假设或极少有可能实现的情况.
条件从句 动词过去式或should +动词原形或were to +动词原形
主句 would/should/could/might +动词原形
如 If Professor Li should have time tomorrow, we could ask him some questions.
2 D 虚拟语气过去式. 表示与过去事实完全相反的假设. 条件从句 had + 过去分词
主句 would/should/could/might + have +过去分词
Eg. If we had started earlier, we should not have missed the train.
If she hadn’t been ill, she might have come.
如果从句里含有should, had, were或其他助动词,则可将从属连词if省去,将助动词.情态动词.be或have放在句首形成部分倒装.
Eg. Were he in your position, he’d have done the same.
Had I had time, I would have done that yesterday.
Should he come tomorrow, I should give him the dictionary.
在非真实条件句中主句和从句的谓语动词所指时间是一致的, 但有时也可能指不同的时间,这时要根据上下文的意思采用不同的谓语动词形式. P 116, 2
Eg. If I were you, I would have taken his advice. (从句指现在, 主句指过去)
If I had taken my raincoat with me this morning, I would not be wet now. (从句指过去,主句指现在).

if条件句：从句+主句
对现在虚拟：从句动词用did /were,主句用would /could /should+动词原形;
对将来虚拟：从句动词用should do,主句用would /could /should+动词原形,
或 were to do;
对过去虚拟：从句动词用had done,主句用would /could /should+had done.
这题中属于第二种情况.
第二题是对现在的虚拟.“如果保尔在决选中得到6票以上,那他就是我们现在的总统了”,看出是对现在的虚拟了吗?
这些题是混合虚拟的,要深刻理解,多做题或是再请教老师.