if与wheather作为连词的用法区别
if与wheather作为连词的用法区别
if与wheather在名词性从句中有时可以互换,但在以下情况只能用wheather: (1)主语从句,表语从句和同位语从句中; (2)介词之后的宾语从句中; (3)动词discuss,don't care等后引导宾语从句. 例如: It depends on whether she is ready or not. The question is whether to leave or not.