名词性从句 主语从句 表语从句 宾语从句 同位语从句 它在复合句中的功用相当于名词，分别作主语、表语、宾语和同位语。这四种从句和主句之间不用逗号。

Tell the function of the following sentences. a. subject b. object c Tell the function of the following sentences. a.subject b. object c. predicative d. appositive 1.The idea that England stands for Fish& Chips,Speakers’ Corner ,Big Ben and the Tower of London is past. 2.The fact that Great Britain is made up of three countries is still unknown to many. 3.The result of so much French influence was that the English language ended up with many French words such as table, animal and age. 4.Some people feel that Wales is an ancient fairy land. 5.That most of these are now threatened and may disappear is a serious matter to the people in Britain. 6.They realize that it is of great value to record and teach them to the younger generation. appositive appositive predicative object subject object

引导名词性从句的关连词 从属连词 that, whether, if 连接代词 who, whom, whose, what, that 连接副词 when, where, how, why

主语从句 在复合句中作主句的主语.引导词有连词that (that 不可省),whether; 代词有who, what ,which,whom, whose;副词 when ,where, how, why; 复合代词 whatever, whoever 等.如: 1.That he is a famous singer is known to us. (It is known to us that he is a famous singer.) 2.When he will go to America is not yet fixed. (It is not yet fixed when he will go to America.)

a. 主语从句如果使用连接代词what, whatever, whoever等引导的，表示的是一个具体的东西或人，这种主语从句不能用引导词it来替换。 e.g. What he said interested me greatly. Whoever is tired may rest. b. 如果句中作主语的是一个从句，则谓语动词要用单数形式 e.g. How close parents are to their children has a strong influence on the character of the children.

c. if 不可以引导主语从句，要用whether. If he will write the book is not yet decided. It is not yet decided whether/if he will write the book. 主语从句不在句首时，则可以用if 来代替whether.

The problem is that we didn’t get in touch with him. 表语从句 在复合句中作主句的表语.引导词有连词that (that 不可省),whether, as if, as though; 代词有who, what ,which,whom, whose;副词 when ,where, how, why 等.如: The problem is that we didn’t get in touch with him. This is how Henry solved the problem. His suggestion is that we (should) finish the work at once. 如果句子的主语是suggestion,advice.order等名词时,后面引导 的表语从句用should+动词原形,should可省略.

宾语从句 在复合句中作主句的宾语.引导词有连词that (that 常可省略),whether,if; 代词有who, whose,what ,which;副词 when ,where, how, why 等.如: We believe (that) he is honest. I told him (that) I would come back soon. He said (that)he would go there the next day and that his family wouldn’t go there.

同位语从句 在句中起同位语的作用.一般放在名词 fact , news , idea , promise, thought , suggestion 等之后,用以说明或解释前面的名词.引导词有连词 that ;少数情况下也可用连接副词等.如 : 1.The thought that we might success excited us. 2.The idea that they should try a second time is worth considering. 3.The suggestion that the plan (should) be delayed will be discussed tomorrow. 名词suggestion,advice.order等词后的同位语从句的谓语动词 要用should+动词原形,should可省略.