最复杂的问题往往答案是最简单的，英语当中共有定语从句，名词性从句和状语从句三大类型，期中前两者的逻辑关系不好辨别，现在我给大家最基本的从技术的角度来判定定语从句和名词性从句。
一 定语从句
1 定义：顾名思义，定语从句起到的是形容词的功能，需要翻译成‘-----的’，很多时候学生根据语感读完句子就可以判定这是一个定语从句了
2分类：限定和非限定定语从句两种
3 定语从句必须有先行词，可以是一个名词， 代词，名词短语甚至是一句话
4 定语从句有两大类词引导：关系代词和关系副词
5 从句的引导词在从句中的句子成分
关系代词
That (3)主 宾 表、
Which (2)主 宾 （物）
Whose (1)定
Who (2)主 宾 （人）
Whom (1)宾 （人）
As (3)主 宾 表
关系副词
Why (1)原因状语
Where (1)地点状语
When (1)时间状语
6 定语从句分为限定性和非限定性两种，非限定性有逗号，没有that和why这两个引导词
7 关系代词在限定性定语从句中做宾语可以省略
掌握上面7条基本规律，可以说大部分定语从句都迎刃而解。
二 名词性从句
1 做主语的句子叫主语从句，常常 和it形式主语搭配
2 做表语的句子叫表语从句，放在be动词和系动词之后
3 做宾语的句子叫宾语从句，放在动词，介词和形容词之后
I am sure you looked beautiful that evening.
4 做同位语的句子叫同位语从句，放在有内容的抽象名词之后
注意：同位语从句所用连词that不是从句的一个成分，定语从句所用关系代词that是从句中的一个成分。
He put forward the suggestion that the second question should be discussed first.
The suggestion that he had put forward was turn down.
下面提供一些判断名词性从句的例句，大家可以自行判断，如果有需要，可以加我，我发给大家答案。
1. The house where I lived ten years ago has been pulled down.
2. What I told you is true.
3. These photographs will show you what our village looks like.
4. The boys who are playing football are from Class One.
5. I don’t know how many students there are in our school.
6. I once lived in a house whose roof has fallen in.
7. A computer can only do what you have instructed it to do.
8. Do you like the book the color of which is yellow?
9. She can marry whoever she chooses.
10. Mr. Ling is just the boy whom I want to see.
11. The classroom the door of which is broken will soon be repaired.
12. I want to know what has happened to her.
13. The school in which he once studied is very famous.
14. What he said at the meeting astonished everybody present.
15. He loved his parents deeply, both of whom are very kind to him.
16. That the baby could speak made his parents very happy.
1. People will not forget who devoted their life to the freedom of our country.
2. There was a time when all scientists were willing to share their results.
3. You should always care about who care about you, who you love and who give you all the support you need.
4. The government building where we voted was very tall.
5. I don’t care which country you are from or which university you are studying in.
6. You need to convince the reader that you understand what the company or organization does, and what the job or course will involve.
7. The country is in the situation where a war will break out at any time.
8. Scientists are studying why daydreaming is beneficial to people's health.
9. The brave doctors and nurses, who came to be known as the “Angels in White”, risked their lives in order to protect the country.
10. We found a large atlas with good maps which showed details of world geography.
11. In his youth Charles Darwin enjoyed all the freedom to experiment and do whatever he liked.
12. The reason for his absence was that he was ill.
13. There he wrote his Record of My Travels, which gives information on Central Asian, Arabic and African countries.
14. A team is a group of individual people brought together in order to accomplish a task that cannot be effectively completed by any member of the group alone.
15. What the doctors really doubt is whether my mother will recover from the serious disease soon．
16. Whether we'll go camping tomorrow depends on the weather.
17. The question is whether the film is worth seeing．
18. Kooris developed a way of life that was suitable for this hot and dry country.
19. Why he left so abruptly is not known to any of us.
20. Some people who live in the mountains of eastern USA speak with an older kind of English dialect.
21. When the government will take effective actions is still uncertain.
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