从句怎么弄?如if引导的虚拟语气?
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从句怎么弄?如if引导的虚拟语气?
从句怎么弄?如if引导的虚拟语气?
从句怎么弄?如if引导的虚拟语气?
if引导的条件句中的虚拟语气
if引导的条件状语从句可以分为两类：真实条件句（Sentences of Real Condition）和虚拟条件句.凡是假设的情况发生性可能很大,就是真实条件句；当假设是不大可能实现时,就是虚拟条件句.如：
If I have time,I will help you with this work.如果我有时间,我会帮助你做的.
If time permits,we'll go fishing together.如果有时间的话,我们就一起去钓鱼.
If I were you ,I would have attended the meeting.我要是你的话,就去参加会议了.
If he had come here yesterday,he would have seen his old friend.假如他昨天来这儿的话,就会看见他的老朋友.
下面我们一起看看if在条件状语从句中的虚拟语气.
1.表示与现在事实相反的情况.其句子结构为：从句：if + 主语+ 动词的过去式(be 用were) + ……主句：主语+ would (should,could ,might) + 动词原形+ ……
If I were you,I would read it again.如果我是你的话,我再读一遍.（事实上我不是你）
If he hurried,he could catch the first bus.他要是快点能够赶上头班公共汽车.（可他不急）
If she knew English,she would not ask me for help.如果她懂英文,她就不必要我帮了.
2.表示与过去事实相反的虚拟条件句.其句子结构为：从句：If + 主语+ had +过去完成式动词+ ……主句：主语+ would (should,could,might) + have +过去完成式动词+……
If you had taken my advice,you would not have made such a mistake.如果你听了我的劝告,就不会犯这样的错误.（事实上你没有听我的劝告）
If it had rained yesterday,we would have stayed at home.如果昨天下雨的话,我们就会留在家里.
If I hadn’t been ill yesterday,I might have come to school.昨天要是不生病,我是可能来上学的.（事实上我生病了）
If you had studied harder last term,you could have passed the exam.如果你在上个学期用功一些,你就会在考试中过关了.
3.表示与将来事实相反的虚拟条件句 (对将来的事实实现的可能性不大).其句子结构为：从句：If + 主语+ should (或were) + 动词原形+……主句：主语+ would (could,should,might) + 动词原形+……
If it should rain tomorrow,I would stay at home.如果明天下雨的话,我将待在家里.（根据天气情况,明天不可能下雨）
If he came tomorrow,I would do it with him.如果明天他来的话,我将和他一起做此事.（事实上他来的可能性很小）
If he were here,I would give him the books.如果他在这儿,我可能会把书给他.