摘要：大学英语四级语法要从词类、时态语态、从句等方面进行学习。以下是威廉希尔app 为考生提供的2013年大学英语四级考试语法的考核重点分析和复习方法指导。
1.主语从句：does she love dog-walking?
Whether she loves dog-walking or not is unknown.
2.宾语从句：外语教%育网www.exam8.com
I don’t know if/whether whether she loves dog-walking
3.表语从句：
My concern is whether you are a student or not.
4.同位语从句：
They are faced with the problems whether they should continue to play.
补充：if whether区别
1)if一般用于引导宾语从句，而whether可引导所有名词从句
If he comes or not makes no difference.
The question is if he will arrive.
2)if 不和or not直接连用，一般不说 if or not。但可以说 if … or not 。而whether没有此限制。
I don’t know if or not he arrives.
I don’t know whether or not he arrives.