英语if语法?就是IF后面如果加动词要什么形态?还有其他的一些用法是什么?
2019-06-21
英语if语法?
就是IF后面如果加动词要什么形态?
还有其他的一些用法是什么?
优质解答
if 引导的从句较多,个人以为一般状语从句较简单,而虚拟语气比较复杂,所以简单写了点虚拟语气用法.
if 虚拟用法
1、对将来虚拟 if +did/were to /should , .would/could /might +do
其中 were to 和should 可以倒装
例如：If it were to rain = Were it to rain
If it should rain =should it rain
2、对过去虚拟if + had done,.would + have done
倒装 Had it done .
例外： If i had followed his advice ,i would not be in such trouble .句中用be 而非 done是因为现在处于困境中
3、对现在虚拟 if +did ,...would /could /might +do
if 引导的从句较多,个人以为一般状语从句较简单,而虚拟语气比较复杂,所以简单写了点虚拟语气用法.
if 虚拟用法
1、对将来虚拟 if +did/were to /should , .would/could /might +do
其中 were to 和should 可以倒装
例如：If it were to rain = Were it to rain
If it should rain =should it rain
2、对过去虚拟if + had done,.would + have done
倒装 Had it done .
例外： If i had followed his advice ,i would not be in such trouble .句中用be 而非 done是因为现在处于困境中
3、对现在虚拟 if +did ,...would /could /might +do