1.连接词
1.从句为陈述句，常选择连接词that或将that省略，直接与主句相连。
2.从句为一般疑问句，常选择连接词if或whether。在 whether … or not 结构中不能用 if 替换。
3.从句为特殊疑问句，常选择what,when,where,which,who,how等的疑问代、副词作连接词。
注意：当who为主语时，句式为：who+谓语+其他
2.判断时态情况：
1.主句是一般现在时，从句为各种时态情况。
2.主句是一般过去时，从句为各种相应过去时态注意：从句描绘客观事实，用一般现在时。
3.关系代词：that，who，whom,whose,which
eg: 1. The teacher told the children that the sun____ round.
A. was B. is C. were D. are
2. I believe that our team____ the basketball match.
A. win B. won C. will win D. wins
3. I don’t know____ to visit the old man.
A. whether B. if C. that D. who
4.The soldiers soon reached( )was once an old temple( )the villagers used as a school.
A.which;where B.what;which C.where;which D.what;where
答：选B，动词reach后接宾语从句，从句缺少宾语，where不可，which引导宾语从句时表疑问含义“哪一个…”而此句中并非疑问含义，不知道哪一座庙宇，而是用what从句表陈述含义，意“过去的一座旧庙宇”;temple后为对其修饰的定语从句，用关系代词which代替，并在从句中作动词used的宾语，use sth. as…“把…用作…
宾语从句用作宾语。如：
Do you know where he lives?
定语从句相当于一个形容词，用于修饰前面的名词。如：
The student who answered the question was John. 回答问题的学生是John.
This is the man whom he is looking for.
Do you know the girl who is in red?
语法~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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