名词性从句。
置于动词、介词后面，起宾语作用的从句叫宾语从句。
i believe that his words are true. 这是关系词that 引导的宾语从句，作believe的宾语。
一．连接代词that /who/ whose /which /what …(注：that引导时，没有实际意义，仅起连接作用，可省略)
连接副词when /where /why /how /whatever /whether(if)..
选择：1. he said __i was too young to understand the matter. a. that b. what
2. i don’t believe __he saida. that b. what
3. i wonder they will come to our partya. that b. whether
4. can you tell me __you are waiting fora. who b. how
二．宾语从句的语序是陈述语序，不到装。
are they looking for? i don’t know
will the train le**e? do you know
三：表语从句是跟在系动词后面的句子。主要的系动词be（is am are was were）
.the question is whether he can finish the task on time.
注：1. 有些that引导的宾语从句，可以移到句子后部，而用it作形式宾语。
例：i find it necessary that we should help the poor.
2.有些形容词（afraid, sure等）之后也可以带宾语从句。 例：i am sure he is right.
主语从句 和宾语从句反过来，主语从句是放在谓语动词前面，起主语作用的句子。
一：1. where she has gone is not known.译where引导的主从）
2. who will go is not important. 译who引导的主从）
they need is more time. 译what 引导的主从）
二： that 引导主语从句时，不担任成分，只起到连接作用。* that the earth is round is well-known to us.
三：主语从句有时为了使句子保持平衡，避免头重脚轻，可以用it作形式主语。
1. that the earth is round is well-known to us. -is well-known to us
2. whether she will come is still a question. -is still a question
同位语从句。
同位语从句，就是作名词同位语的从句。
1. we know the truth that air is necessary to living things.
the truth 是先行词，that 引导的同位语从句，对the truth 进行解释说明。
2. the question who will take his place is still not clear.
the question 是先行词，who引导的同位语从句，对question进行解释。
3. 跟同位语从句的名词有news，idea，fact，promise，question，doubt，thought，suggestion，words（消息），等。关系词有：
that, who, how, whether, where等。
4.与定语从句的主要区别：①定语从句的先行词that，在从句中担任成分， 而在同位语从句中不担任成分。②看先行词与关系词之间的关系。选择题：定语从句___同位语从句___
① i heard the news that he won the game. ②i heard the news that surprised everyone.
he asked me a question that i didn’t know how to answer.
the president didn’t answer the question when the war would come to an end.
名词性从句讲解
语法讲义 名词性从句。名词性从句 主语从句 表语从句 宾语从句 同位语从句。一 宾语从句。1 that 引导从句无意义，不充当任何成分，常省略。动词后有两个宾语从句第二个that不可省 i know that you h e met him and that you h e become good ...
名词性从句讲解
名词性从句。名词性从句 其功能相当于名词，根据其在句中充当的成分可分为主语，宾语，表语和同位语从句 名词性从句必须用陈述语序。常见引导词 1.that 无意义，在名词性从句中不充当成分 2.whether if 是否 在从句中不充当成分 3.who 谁 在从句中作主语，口语中可作宾语，表语 4.wh...
名词性从句的讲解
十三。主从复合句。名词性从句几点注意事项 1名词性从句一律用正常语序。i don t know when he will come.that is what i want to tell you.2that在主语，表语，同位语从句中不可省略。that he was right was quite c...