Section ⅢGrammar- 虚拟语气(2)

　　语法图解

　　探究发现

　　①If you had come earlier, you would not have missed the exciting scene in the movie.

　　②If you had told me the news yesterday, I wouldn't be so worried now.

　　③Had I left sooner, I would have been there on time.

　　④But for your advice, I would have failed.

　　⑤He treats the little girl as if she were his own daughter.

　　⑥It's high time that we began the work.

　　⑦It's necessary that we (should) learn English well.

　　⑧If only I had not been busy last week.

　　[我的发现]

　　(1)在表示与过去事实相反的虚拟语气时，条件句的谓语动词用"had＋过去分词"形式表示，而主句谓语动词则用"would/should/might/could＋have＋过去分词"表示。(如例句①)

　　(2)当条件句的谓语中有had, were或should时，可将if省略，同时将had, were或should提到从句主语的前面，形成倒装。(如例句③)

　　(3)当主从句所指的时间不一致时，其谓语动词应分别根据自己的具体情况采用适当的形式。(如例句②)

　　(4)有时某些介词短语、副词或上下文可以表示虚拟条件，这种虚拟语气叫含蓄条件句。(如例句④)

　　(5)as if引导的从句所表达的内容不是事实时，其谓语动词应用虚拟语气。(如例句⑤)

　　(6)虚拟语气还用于某些特殊句式(结构)中。(如例句⑥、⑦和⑧)

一、与过去事实相反的虚拟条件句