（1）同位语从句
eg：I know the man, the president of the New Oriental School.
同位语从句：对前面名词的进一步解释；
英语中的简单句：陈述句、一般疑问句、特殊疑问句。
eg：He is a student.
Are you a student?
Who is a student?

同位语从句：关系词不再和前面的名词有关系，而是取决于后面的从句；
eg：I know the fact.
He is a student.
I know the fact that he is a student.
eg：I have a question.
Are you a student?
I have a question weather you are a student.
I have a question who is a student.
① 从句仍然接在名词之后，名词有可能为answer，belief，concept，explaination，fact，hope, message, news, promise, prove, question, thought等，后面可以接同位语从句；
形式：名词+从句；连接词取决于后面的从句是什么样的形式；
如果是陈述句，直接加that引导；
一般疑问句：先把一般疑问句变成陈述句语序，然后在其前加上weather或者if；
特殊疑问句：直接保留特殊疑问词，后面的句子变成陈述句语序；
eg： The news soon spread the whole school.
They had won the game.
The news that they had won the game soon spread the whole school.
The news that they had won the game came.
News came that they had won the game.
eg： Information has been issued.
More middle school student will be adimited to universities.
Information that more middle school student will be adimited to universities has been issued.
Information has been issued that more middle school student will be adimited to universities.
eg： The question was answered by the family doctor
Weather we should send for an specialist.
The question weather we should send for an specialist was answered by the family doctor.

同位语从句的形式和定语从句的形式非常相似，两者最大的区别在于同位语从句的功能在于对前面的名词进行进一步的解释，定语从句的功能在于对前面的名词进行进一步的修饰和限定；
如果关系词为weather，how, what, 一定是同位语从句； 如果名词前的关系词为when, where, why，若when前面的名词是地点，where前面的名词是时间，why 前面的名词是原因，那么一定是定语从句；若when, where, why前面不是地点、时间和原因，那么是同位语从句； 如果关系词为which，则通过中文翻译进行区分；若which能翻译成哪一个，则一定是同位语从句，若不能，则为定语从句； 如果关系词为that，则需要对句子进行成分分析来判定；如果that在句子中充当成分，则是定语从句，否则即为同位语从句；
eg：The suggestion that she should stay in the room is good.
The suggestion that she has given in the meeting is good.
例：The fact that ordinary citizens are now starting to think seriously about the nation's moral climate, says this ethics professor at the University of Chicago, is reason to hope that new ideas will come forward to improve it.

(2) 宾语从句
从句部分的连词取决于从句时一般疑问句、特殊疑问句还是陈述句；
eg：We must find out who did all these.
I want to know weather he will come.
I hope that he will come.

① 宾语从句的时态：如果宾语从句前的动词是过去式，则宾语从句的时态应相应变成过去时态；如果宾语从句是客观事实或真理，不管宾语从句前的动词时什么时态，宾语从句都用一般现在时；
eg：The teacher told us that the earth is round.
eg：Todd Park, a local detective, said the method has helped him learn more about an unidentified woman whose skeleton was found near Great Salt Lake.


② 宾语从句后接陈述句，用that引导，则that一般可以省略；
eg：I think that you are right.

③ 宾语从句如果谓语动词是doubt，后面接的一般疑问句通常用weather或if引导；如果前面的谓语动词是don't doubt，则后面从句的连接词一定是that；
eg：I doubt weather he is telling the truth.
I don't that he is telling the truth.
宾语从句如果谓语动词是wonder，句型为I wonder if，后面的连接词不能用weather；