英语的主句和从句怎么区分啊

Question

我不需要区分宾语从句、时间状语从句、定语从句等等
我只是想知道怎么区分主句和从句

例如：
We are sure that he didn't see the movie last night.

Bill's aim is to inform the viewers that cigarette advertising on TV is illegal

这些句子哪个是主句哪个是从句？

Answer 1

We are sure that he didn't see the movie last night.
中，主句格式为：We are sure that……
从句由that引导,由于住居缺宾语，而且，从句是一个完整的句子，所以此句为宾语从句。
Bill's aim is to inform the viewers that cigarette advertising on TV is illegal 。
在此处，inform sb. sth.中的sb. sth.都是宾语，为双宾语。所以还是一个宾语从句。

Answer 2

你这两句都是名词性从句.

其中第一句,为宾语从句
We are sure that he didn't see the movie last night.
主句:We are sure
从句:he didn't see the movie last night

第二句,同位语从句
主句:Bill's aim is to inform the viewers
从句:cigarette advertising on TV is illegal

Answer 3

从句前面一般有关联词， that ,when ,where等

Answer 4

额，说不好

你就记得一般前面是主句，后面大多数都是修饰前面某个词的是从句.
We are sure（主系表结构）是主句，后面that he didn't see the movie （last night时间状语）

Bill's aim（主语） is （谓语）to inform the viewers（宾） 前面的是主句，that cigarette advertising on TV is illegal

定语从句一般是用来修饰的是一个名词。
定语从句一般由关系代词和关系副词引导1、关系代词:who,whom,whose,which,that,as2、关系副词:when,where,why
宾语从句在句子中起宾语作用的从句叫做宾语从句.宾语从句分为三类:动词的宾语从句,介词的宾语从句和形容词的宾语从句.时态:1·主句用一般现在时,从句可用任意时。2·主句用过去时,从句用过去某个时态

Answer 5

We are sure 什么是主句.
he didn't see the movie last night.
是从句.

Bill's aim is to inform the viewers 什么是主句
cigarette advertising on TV is illegal
是从句