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与现在事实相反的虚拟语气

发布时间：2015-01-20 编辑：查字典英语网小编

与现在事实相反的虚拟语气

请看下面的题目：
If he was here，he __________ us how to do it.
A. told B. would tell C. had told D. have toldhttp://yingyu.chazidian.com
此题应选 B。该题考查与现在事实相反的虚拟语气：此时条件从句的谓语动词用过去式，主句的谓语则要用 would (should，could，might)+动词原形：
If there were no subjective mood，English would be much easier. 要是没有虚拟语气，英语就会容易得多了。
If I knew his telephone number，I would ring him up. 我要是知道他的电话号码，我就给他打电话了。
在虚拟条件句，动词be的过去式通常用were(不管是单数还是复数)，但在现代英语，单数情况也可以用was：(http://yingyu.chazidian.com)
We could ask him if he were [was] here. 他要是在这里，我们就可以问问他了。
但是在某些表达(If I were you，as it were等)中，be只用were这一形式：
If I were you，I should go and see the doctor at once. 假若我是你，我会马上去看医生。
The sky is covered，as it were，with a black curtain. 天空好像是被黑幕遮住了似的。
有时在虚拟条件句也可能用 could，might 等，那多半是因为语义的需要：
If he could help you，he would help you. 要是他能够帮助你的话，他会帮助你的。

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