在復合句中用作賓語的從句叫做賓語從句。它是眾多從句中的一員，在復合句中作主句謂語動詞、介詞或某些形容詞的賓語。

在及物動詞的后面可以接一個名詞來充當賓語，如： I know the man.

而這時也可以用一個句子來充當賓語，如： I know that the man is a policeman.

賓語從句三大塊: 1. 引導賓語從句的連詞和代詞選擇; 2. 賓語從句的語序; 3. 賓語從句的時態。

Ⅰ.賓語從句的引導詞

1.陳述句充當賓語從句時，用that引導，that無詞義，在口語或非正式文體中常省略。如：

My teacher said I was a good boy.老師說我是個好男孩。

She doesn’t know (that) she is seriously ill. I am sure (that) he will succeed.

用以下開頭與下列句子連成賓語從句:

1. I know …

2. She says …

3. Tell your friend …

(that)

1.This is a book.

2.You like singing.

3.He worked last night.

4.They will go home.

5.Jim has been to Beijing.

6.She sings well.

2.當由一般疑問句充當賓語從句時，用if或whether引導，意為“是否”。如：

(1) Is Jim a good student? I don’t know

I don’t know if /whether Jim is a good student.

(2) Does Kate get up early? Do you know?

Do you know if /whether Kate gets up early?

用以下開頭與下列句子連成賓語從句:

1.Do you know …

2.I want to know …

3.The teacher asks …

if/whether

1.Is he reading ?

2.Do you get up at six?

3.Does Tom work hard?

4.Did you watch TV ?

5.Will they read books ?

6.Can you sing ?

注意：只能用whether不用if 的三種情況

? 一般情況下，if 和whether可以互換，但以下3種 情況只能用whether：

? ①與or not連用：

He asked me whether or not I was coming. Let me know whether you can come or not.

? ②在介詞之后：

It depends on whether it is going to rain. I worry about whether I hurt her feelings

? ③在不定式之前：

We haven’t decided whether to go there. I don’t know whether to accept or refuse.

3.如果賓語從句原來是特殊疑問句，只需用原來的疑問詞引導。如：

1.What is she doing? Can you tell me?

Can you tell me what she is doing?

2.Where does she live? Do you know?

Do you know where she lives?