宾语从句其实就是把一个从句（一个功能齐全的简单句或复合句）嵌入一个简单句里。例如：

I declare that my work is original. 我宣布我的作品是原创的。

• 主句： I declare that 我宣布了一件事。

• 从句：My work is original 我的作品是原创的。

• 从句修饰主句：我宣布我的作品是原创的。

例句就是把一个主系表结构的从句嵌入主谓宾结构的简单句里。

陈述句

一般疑问句（从句中必须是陈述句语序，非疑问句）

• I wonder whether/if Jim is at home.

• I wonder whether tomorrow is a good time to visit her.

特殊疑问句（从句中必须是陈述句语序，非疑问句）

• He didn't tell me when we shall meet again.

• She always thinks of how she improve her work.

• She will give whoever needs help a warm support.

• Can you tell me who the beauty is?

有些动词可直接连接宾语从句，如 believe，admit，consider，dream，promise, declare 等, 基本所有及物动词都能这么用

• I declare that my work is original.

• I do not admit that I have cheated.

• They informed me that I have been promoted.

• I promise you that I will finish this work within a month.

• I promise that I will never break my words.

用it做形式宾语, find, feel, consider, make, believe, think等后面有宾语补足语的时候

• I think it necessary that we take measures to reduced green house emission.

• I have make it clear that you are not welcomed here.

• We take it that you will agree with us.

介宾从句

很多动词和介词搭配使用，如 depends on, surprised at

• Whether you can succeed depends on how hard you try.

• He was not conscious of what a big mistake he had made.

• I am surprised at what you said.

介词宾语一般不跟that，只有在固定搭配时例外，如in that，except that, but that, save that等

• He is different from others in that he is brave.

• I know nothing about him except that he killed the dragon.

• Your outlook is perfect except that your shoes are dirty.

形宾从句

形容词有动词的意思, sure, certain, glad, please, happy, sorry, afraid, satisfied, surprised

• I am sorry I am late

• I am not sure this is your true intention.

• We are glad you are one of us now.

用whether或if引导的宾语从句

• Whether this is true or not, I really don't know.

• Whether you like me or not, I really don't care.

不能省略引导词that的状况

从句是直接宾语

• She told me that the match has been concealed.

• I can't let him know that his mother is ill

多个that引导的从句，后面的that不可省略

• Mama said (that) you are an angel and that she will not allow anyone to hurt you.

• We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty, and the pursuit of Happiness. 我们认为这些真理是不言而喻的：人人生而平等，造物者赋予他们若干不可剥夺的权利，其中包括生命权、自由权和追求幸福的权利。——经典例句，来自独立宣言。

谓语和that之间有插入语

• I noticed, for the first time, that she was not the girl I want.

it 做形式宾语时

• I think it necessary that we hold a meeting to solve this problem.

That前置的强调句

• That he is stupid is known to everyone.

否定转移

主句的谓语动词是think,believe,imagine,suppose,consider,expect,fancy,guess时，从句的否定词转到主句

• I don't think (that) you are right.

• I don't know (that) you are coming. otherwise I would have picked you up at this airport.

主从句时态关系

主句为一般现在时或一般将来时，从句时态不受主句影响

主句为过去时

• 表示同时主从句动作同时发生：从句用一般过去时，过去进行时 She said she was playing video games.

• 动作发生在主句动作之前：从句用过去完成时 He didn't know what they had come here for.

• 动作发生在主句动作之后：过去将来时 He told me he would spend his holidays with his girl friend.

如果从句是客观真理，它不受主句时态的影响

I knew that the earth goes around the sun.