定语从句的用法较为复杂，高考除了单独考查定语从句知识外，还常常结合句式结构、时态等来综合考查。纵观近几年各地高考试题，不难发现其考点主要包括：
1．考查关系代词和关系副词的区分。如：that，which和where，when的区分； that，which和why的区分等。
2．考查whose的使用。whose可以指代人或物，在定语从句中作定语，后跟名词。指物时，whose＋名词＝名词＋ of which ＝ of which＋名词。如：
The classroom whose door/the door of which/of which the door is broken is on the second floor.
3．考查as/which引导的非限制性定语从句。尤其要重视which，as引导的非限制性定语从句和it，what引导的主语从句的区分。
4．考查定语从句中的主谓一致现象。如：
I, who am your close friend, will try my best to help you whenever you are in trouble.
5．考查“介词＋关系代词”引导的定语从句。“介词＋关系代词”引导的定语从句，关系代词指人时用whom，指物时用which，不能用that。关系代词作定语时也可用whose。如：
The teacher in front of whose house stands a tall tree is very patient with his students.
