as if与if的区别 语法上,

as if与if的区别 语法上, as...as与as if 的区别 求if 和 as if在使用上的区别, even if ,as if,if only 与only if的区别? 表语从句在表语从句中,as.与as if的用法上的区别 as long as 与only if 的用法区别 as if 与 as though 有无区别 as long as 与if only 区别 As if + doing 和 As if + to do 的区别 if as 和 as if 的区别是什么? as if和as through的区别 look like 与look as if 的区别是什么啊