题目

if you were my daughter对吗?if有虚拟语气的用法吗
suppose you were my daughter对吗?

提问时间：2020-11-20

答案

对的.
虚拟语气
l 虚拟语气的使用范围及判断
一虚拟语气表示一种不能实现的假设.该语法主要用于if 条件状语从句.也可用于主语从句、表语从句、宾语从句等.
二 if 条件状语从句中虚拟语气的判断
If 条件状语从句有真实条件句和非真实条件句.假设条件可以实现的句子为真实条件句（如在阴天说if it rains,we would not go out）,反之为非真实条件句,要用虚拟语气.
三假设条件一般为：
1） 与过去事实相反,从句谓语动词用过去完成时,主句动词为情态动词＋完成时态.
e.g.If I had come here yesterday,I would have seen him.
2） 与现在事实相反,从句谓语动词用一般过去时,主句动词为情态动词＋动词原形.
e.g.If I were a teacher,I would be strict with my students.
3） 与将来事实可能相反,从句谓语动词用过去将来时,主句动词为情态动词＋动词原形.
e.g.If it should snow tomorrow,they couldn’t go out.
主句谓语动词为情态动词（should,would,could）＋和相应的从句一致的动词形式.
四 if 条件句中如果有were,should,had,可以省去if,并使用倒装句序.
l 宾语从句中的虚拟语气
一 wish后面宾语从句中的虚拟语气：根据从句的意义来判断：
1．与现在和将来相反的事实,从句谓语动词用过去时态；
e.g.I wish I were a bird.
2．与过去相反的事实,从句谓语动词用过去完成时态.
e.g.I wished he hadn’t done that.
二表示“要求、建议、命令”等动词后面的宾语从句中的虚拟语气
从句用“should + 动词原形”构成.而且should 可以省去.用于此结构的动词有：advise,direct,agree,ask,demand,decide,desire,insist,order,prefer,propose,request,suggest等.
e.g.I insisted that he (should) go with them.
He suggest that a meeting (should) be held to discuss the matter.
He demanded that I (should) help him.
注意：当insist 表示“坚持认为”、suggest表示“表明,显示”时,不用虚拟语气.
e.g.He insisted that he was honest.
The look on his face suggested that he was quite satisfied with what I had done for him.
三 would rather + 从句
在这种结构中,从句的谓语动词用过去形式表示虚拟.
e.g.I would rather you did this instead of me.
l 主语从句中的虚拟语气
一 It be + 形容词+ that….(should)….
用于该句型的形容词有：necessary,good,important,right,wrong,better,natural,proper,funny,strange,surprising,etc.
e.g.It is necessary that we should get everything ready by the end of the week.
It’s natural that he should feel hurt.
一些名词也可用于此结构中,如 a pity,no wonder,…..
二 It be + 过去分词＋ that……(should)……
用于该结构中的过去分词是表示“建议、请求、命令”等词的过去分词.如：desired,suggested,requested,ordered,proposed等.
e.g.It is desired that the building of the house be completed next month.
三 It is time (about time/ high time) that…..(过去时动词形式或should + 动词原形)…..
e.g.It is high time I went home now = It is high time I should go home now.
l 表语从句、同位语从句中的虚拟语气
在suggestion,proposal,order,plan,idea,advice,decision等需要具体内容解释的名词后的表语从句、同位语从句中,要使用虚拟语气、其谓语动词为：should + 动词原形.连接从句的that 不能省略.
e.g.My suggestion is that we should go there at once.
What do you think of his proposal that we should put on a play at the English evening?
The proposal that we should stay longer in Shanghai was rejected.