動詞不定式在句中可用作謂語嗎

一、動詞不定式在句子中不能充當謂語，沒有人稱和數的'變化。

二、動詞不定式是由“to+動詞原形”構成(有時可以不帶to)。動詞不定式的否定形式是“not+動詞不定式”(not不與助動詞連用)。

三、動詞不定式短語具有名詞、形容詞和副詞等的功能，可在句中用做多種句子成分。

1、主語：常置於句末，而用it代替其做形式主語。

例：

To go in for sports helps you stay fit.

It helps you stay fit to go in for sports. It is dangerous to swim in the deep sea on your own.

It's right of him to refuse the invitation1.(him為邏輯主語)

2、表語：Our duty is to protect the enviroment.

3、動詞賓語：此種情況可按固定搭配或句式去記。

例：would you like to see my photos?

Kevin planned to visit his uncle.

I found it very difficult to get a job.(it為形式賓語)

4、賓語補足語：

(1)在多數複合賓語及物動詞後要帶to。

例：I asked a friend to read it to me.

(2)在表示感覺、致使等意義的動詞(see，watch，hear，feel，notice，observe，make，let，have，help等)後不帶to。

例：They heard him sing a pop song in the meeting room.

5、定語：動詞不定式做定語放在所修飾的名詞的後面。

例：Vinny is the first disabled2 person to sail3 around the world.

6、形容詞補足語：在表示心理、感情、評價等的形容詞後，對其進行補充說明。

例：Weareverygladtomeetyouagain.

7、狀語：表示目的、原因、程度等。

例：They brought in photos of their families for me to look at.

動詞不定式在句中不可用作謂語。因為動詞不定式是非謂語動詞形式。

動詞不定式在句中可用作的成分有：

一：作主語

To say is one thing and to do is another.

二：作表語

Her dream is to become a doctor.

三：作賓語

Mary likes to sing.

四：作定語

I have a letter to write.

五：作狀語

Alice came here to borrow my bike.

六：作補足語

1、作賓語補足語

Lucy asked me to help her.

2、作主語補足語

The workers were made to do very hard work.

動詞不定式在句子中不能做謂語。動詞不定式和動名詞，現在分詞，過去分詞一樣，都是非謂語動詞，是在句子中不能做謂語的，就是本身是動詞，動詞的意思，但因句子成分需要充當謂語以外的其他成分，就發生了變化，to或Ing或ed等。動詞不定式可以做謂語以外的任何成分，如主語、賓語、表語定語等