The problem is ___ he has enough time.

题目

The problem is ___ he has enough time.
A.if
B.whether
C.that
key ;A
这是不是表语从句?表语从句能用if吗?

答案

是表语从句
连接表语从句时不能用IF只能用whether
还有就是如果选择题中同时出现whether和if
一般都选whether
考试多年的经验