1.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. 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. 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.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. “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.
6.一些特殊的先行词。如： 当situation, point, case, activity, scene及period, festival, occasion等出现时, 要
注意具体情况具体分析；作主语、宾语和表语时, 用关系代词that/which; 作状语时, 用关系副词
where/when或“介词＋which”, 表示在某种特定的情形下。
7. 定语从句、强调句、时间状语从句等的区别。
