Question

求问英语真实条件句和非真实条件句的详细语法!顺便讲解下!

Answer 1

真实条件句用于陈述语气,假设的情况可能发生,其中 if 是如果的意思.
真实条件句
时态关系：
（1）当主句为一般将来时,条件从句用一般现在时表示一般将来的动作.
如：We shall go out when you finish your holiday homework.
（2）当主句为过去将来时,从句用一般过去时表示过去将来的动作.
如：I would not go with you if it rained the next day.
(3)现在进行时可在时间状语从句和条件状语从句中表示将来正在进行的动作.
如：Wake me up if I am still sleeping at 7.
(4)当主句为一般将来时,由as soon as,after,before,till/untill,when,if等引出的状语从句常用现在完
成体表示将来完成的动作.
如：I will help you as soon as I have finished my homework.
非真实条件句
1）时态：可以表示过去,现在和将来的情况.它的基本特点是时态退后.
a.同现在事实相反的假设.
一般过去时　should( would) +动词原形
If they were here,they would help you.如果他们在,他们就会帮你了（事实是他们不在）
b.表示与过去事实相反的假设.
过去完成时　　 should(would) have+ 过去分词
If she had worked harder,she would have succeeded.和第一个理解起来差不多,只是一个是
和现在相反,一个是过去相反,必须要看清楚
c.表示对将来的假想,与现在的现实相反
一般过去时　 should+ 动词原形
were+ 不定式　 would + 动词原形 should+ 动词原形
If you succeeded,everything would be all right.
If you should succeed,everything would be all right.
If you were to succeed,everything would be all right.
大部分取自网上,已经将重点列出来了
非真实条件句又称作虚拟语气,要想熟练操作还是需要多做题目的.