摘要：This is the house_(where, which, when) we visited yesterday. 引导词做及物动词visited的宾语，选择whichThis is the house _(where,which, when) we w
高中英语有各种从句，要学好这些从句，必须懂句子成分。否则，困难重重。
一，不知道定语从句的引导词做宾语和状语
This is the house_(where, which, when) we visited yesterday. 引导词做及物动词visited的宾语，选择whichThis is the house _(where,which, when) we went yesterday. 引导词做地点状语，选择where, 相当于to whichI remember the day _(where, which, when) we spent working on the farm.引导词做及物动词spent的宾语，选择which二，不知道这是地点状语从句
where ➕主谓，表示在某某做某事的地方
Put your bag _(where, in which, when) you can find it. 选择where，引导词做状语。_(Where, When, Which) there is a will, there is a way. 选择Where，引导词做状语。三 ，不知道表语和状语的区别
紧靠be 动词后面的就是表语。说明行为动作发生的时间，地点，原因，方式，条件等等的就是状语。
It was nine o'clock _(that, when) we got home last night. 这是when引导的时间状语从句，nine o'clock是表语。强调句不能强调表语的。如果是强调句，我们可以把句子还原We got home at nine o'clock last night. 加了at, at nine o'clock就是时间状语了。这时，可以改为强调句了。
It was at nine o'clock that we got home last night.
It was because he was ill _(that, so, why) he didn't come to school. 选择that，这是强调句，强调原因状语从句。四，主语从句和同位语从句的引导词做什么成分与语境有关
_(That, When, Where, Why, Those) trees begin to bloom is the sign of spring.选择That, 主语从句的引导词没有意思，只是引导作用。Word came _(that, when, which, what) our team won. 选择that, 同位语的引导词没有意思，只是引导作用。You must answer the question _(that, when)you will go back. 根据语境词question判断选择when,同位语的引导词做状语。通过上面的分析，句子成分和引导词的成分在英语学习中，有举足轻重的作用。
来源：郑老师KMYYZY
