在學(xué)習(xí)名詞性從句之前，我們首先要明白一個詞：復(fù)合句

什么叫復(fù)合句

由一個主句和一個或一個以上的從句構(gòu)成的句子叫復(fù)合句。在復(fù)合句中主句是全句的主體，從句是全句的一個成分，不能獨立。從句通常是用關(guān)聯(lián)詞來引導(dǎo)的。在這里關(guān)聯(lián)詞還起聯(lián)系從句和主句的作用。

一、從句的種類：

主語從句、賓語從句、表語從句、同位語從句，定語從句和狀語從句

二、名詞性從句的連接詞

1. 單純連詞

在從句中不補充當(dāng)任何成分，只起到連接從句的功能。

that 沒有實際意義，而whether/ if 在句子中表示“是否” 的意義。

Eg : That the prices of rice will go up is certain. (that引導(dǎo)主語從句，補充當(dāng)任何成分)

He asked if I could come to see him this weekend.

形式主語it 代替主語從句位于句首時，常見的幾種情況：

① It + adj +that 從句(大多數(shù)情況下that從句后用should+動詞原形)

Adj: necessary right clear unlikely strange obvious natural important

Eg: It is necessary to learn English well.

② It +系動詞+名詞+that 從句

Non: a pity an honor good news a wonder a fact no wonder no surpeise

Eg: It is a fact that you are a good boy.

③ It +be + 過去分詞+that從句

過去分詞：said / heard/ reported/ told/ decided/suggested/thought/considered/ hoped/ announced

Eg: It is announced that the plan has been canceled.

注意：

It + be+ suggested/ advised/ ordered/ requested/ insisted/ demand+ that從句， that從句要用should +動詞原形，should可以省略。

Eg: It is suggested that you (should ) spend more time in studying English .

當(dāng)suggest表示“表明”時，不可以用虛擬語氣

Eg: It suggests that you are an honest boy.

Insist 表示“堅持某種說法(事情已經(jīng)發(fā)生過了)”，不用虛擬語氣。

表示“堅持要做(事情沒有發(fā)生)”，要用虛擬語氣。

Eg: she insisted that I have never done such thing .

She insisted that I study abroad.

④It +動詞(+賓語或狀語)+that 從句

動詞如： appear(顯得)/ happen(碰巧)/ matter(重要)/ occur(出現(xiàn))/ turn out(結(jié)果是)

Eg: It happened to me that I was away when he came.主語從句不可位于句首的五種情況：

注意：

(1)if 引導(dǎo)的主語從句不可居于復(fù)合句句首。

(2)It is said /reported?結(jié)構(gòu)中的主語從句不可提前。

正確表達：It is said that President Jiang will visit our school next week.

錯誤表達：That President Jiang will visit our school next week is said.

(3)It happens/occurs?結(jié)構(gòu)中的主語從句不可提前。

正確表達：It occurred to him that he failed in the examination.

錯誤表達：That he failed in the examination occurred to him.

(4)It doesn’t matter how/whether ?結(jié)構(gòu)中的主語從句不可提前。

正確表達：It doesn’t matter whether he is wrong or not.

錯誤表達：Whether he is wrong or not doesn’t matter.

(5)含主語從句的復(fù)合句是疑問句時，主語從句不可提前。

正確表達：Is it likely that it will rain in the evening?

錯誤表達：Is that will rain in the evening likely?

在學(xué)習(xí)名詞性從句之前，我們首先要明白一個詞：復(fù)合句

什么叫復(fù)合句

由一個主句和一個或一個以上的從句構(gòu)成的句子叫復(fù)合句。在復(fù)合句中主句是全句的主體，從句是全句的一個成分，不能獨立。從句通常是用關(guān)聯(lián)詞來引導(dǎo)的。在這里關(guān)聯(lián)詞還起聯(lián)系從句和主句的作用。

一、從句的種類：

主語從句、賓語從句、表語從句、同位語從句，定語從句和狀語從句

二、名詞性從句的連接詞

1. 單純連詞

在從句中不補充當(dāng)任何成分，只起到連接從句的功能。

that 沒有實際意義，而whether/ if 在句子中表示“是否” 的意義。

Eg : That the prices of rice will go up is certain. (that引導(dǎo)主語從句，補充當(dāng)任何成分)

He asked if I could come to see him this weekend.

形式主語it 代替主語從句位于句首時，常見的幾種情況：

① It + adj +that 從句(大多數(shù)情況下that從句后用should+動詞原形)

Adj: necessary right clear unlikely strange obvious natural important

Eg: It is necessary to learn English well.

② It +系動詞+名詞+that 從句

Non: a pity an honor good news a wonder a fact no wonder no surpeise

Eg: It is a fact that you are a good boy.

③ It +be + 過去分詞+that從句

過去分詞：said / heard/ reported/ told/ decided/suggested/thought/considered/ hoped/ announced

Eg: It is announced that the plan has been canceled.

注意：

It + be+ suggested/ advised/ ordered/ requested/ insisted/ demand+ that從句， that從句要用should +動詞原形，should可以省略。

Eg: It is suggested that you (should ) spend more time in studying English .

當(dāng)suggest表示“表明”時，不可以用虛擬語氣

Eg: It suggests that you are an honest boy.

Insist 表示“堅持某種說法(事情已經(jīng)發(fā)生過了)”，不用虛擬語氣。

表示“堅持要做(事情沒有發(fā)生)”，要用虛擬語氣。

Eg: she insisted that I have never done such thing .

She insisted that I study abroad.

④It +動詞(+賓語或狀語)+that 從句

動詞如： appear(顯得)/ happen(碰巧)/ matter(重要)/ occur(出現(xiàn))/ turn out(結(jié)果是)

Eg: It happened to me that I was away when he came.主語從句不可位于句首的五種情況：

注意：

(1)if 引導(dǎo)的主語從句不可居于復(fù)合句句首。

(2)It is said /reported?結(jié)構(gòu)中的主語從句不可提前。

正確表達：It is said that President Jiang will visit our school next week.

錯誤表達：That President Jiang will visit our school next week is said.

(3)It happens/occurs?結(jié)構(gòu)中的主語從句不可提前。

正確表達：It occurred to him that he failed in the examination.

錯誤表達：That he failed in the examination occurred to him.

(4)It doesn’t matter how/whether ?結(jié)構(gòu)中的主語從句不可提前。

正確表達：It doesn’t matter whether he is wrong or not.

錯誤表達：Whether he is wrong or not doesn’t matter.

(5)含主語從句的復(fù)合句是疑問句時，主語從句不可提前。

正確表達：Is it likely that it will rain in the evening?

錯誤表達：Is that will rain in the evening likely?