if条件句一定要用虚拟语气么

Question

如题所述

Answer 1

不是的

某事很可能发生,条件是可能存在的,主句中某种情况发生的概率也是很高的.【主将从现】，即真实条件句，如：
If you ask him,he will help you．如果你请他帮忙,他会帮你的.
If you fail in the exam,you will let him down．如果你考试不及格,你会让他失望的.
If you have finished the homework,you can go home．如果你作业做完了就可以回家了.
if从句还表示不可实现的条件或根本不可能存在的条件,也就是一种虚拟的条件或假设.从句多用一般过去时或过去完成时,表示对现在或过去的一种假设.即非真实条件句，【虚拟语气】如：
If I were you,I would invite him to the party．如果我是你,我会邀请他参加聚会.
I would have arrived much earlier if I had not been caught in the traffic．要不是交通堵塞,我本会来得早一些.