最基础的三个虚拟条件句的结构是什么呢?
问题描述：
最基础的三个虚拟条件句的结构是什么呢?
额.到大学语法都忘光了
我想问的就是
if .过去式 ,.will have done
if.现在时,.是什么呢?
if.将来时,.是什么呢?
答
if sb had done sth,sb should/would/could/might had done
这个是过去
if sb did sth,sb should/would/could/might do
现在
if sb should do/were to do/did sth,sbshould/would/could/might do
将来