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1 當動詞為句子的主詞。

Eating healthy food keeps your body strong. 吃健康的食物可以讓你的身體強壯。

2 放在介系詞後面。

She went to the park after going to the mall. 她去商場後去了公園。

3 在某些動詞後面

I enjoy travelling.我喜歡旅行。
We avoid getting home late.我們避免晚回家。


後面加上動名詞的常見動詞有:avoid, enjoy, finish, hate, keep, like, love, don’t mind, prefer, recommend, spend time, stop, suggest 等。


動名詞的否定形式為 not + -ing。

I like not doing homework at weekends. 我喜歡週末不做作業。

不定詞不加 to

什麼時候不定詞不用加 to

1 在否定和疑問句中的助動詞 do, does, did 後面。

She doesn’t want it. 她不想要。
Do you think she will come? 你覺得她會來嗎?
We didn’t admit anything. 我們什麼都不承認。

2 在情態動詞後面 (will, can, must, should, might, may)

We should work with the group. 我們應該與小組合作。
She won’t come with us. 她不會和我們一起去的。

to + 不定詞

什麼時候不定詞搭配 to

1 形容詞後面。

It’s dangerous to walk alone on this street. 一個人走在這條街上很危險。

2 表達原因或目的。

I went to the store to buy some groceries. 我去商店買了一些雜貨。
She bought a cake to give to her son. 她買了一個蛋糕給她的兒子。

3 在疑問字後面。

I couldn’t decide where to go. 我無法決定去哪裡。
She wants to learn how to swim. 她想學怎麼游泳。

4 在某些動詞後面。

We expect to work on this project.我們希望在這個項目上工作。
He agrees to talk with the lawyer. 他同意與律師交談。

放在 to + 不定詞前的常見動詞

放在不定詞前的常見動詞有:decide, forget, help, hope, learn, need, offer, plan, promise, remember, seem, try, want, would like, would love, would hate, would prefer等。

to + 不定詞的否定形式

to + 不定詞的否定形式為 not to + 不定詞。

He plans not to travel to Hong Kong. 他计划不去香港旅遊。

不定詞 VS 動名詞 – 練習題

1. I am excited about the new game.

2. She wants her dogs for a walk.

3. Have you finished the wall?

4. She preferred to the police.

5. is too expensive for me.

6. I couldn't her since I'm busy.

7. He wants the victims.

8. She planned as soon as possible.

9. I started the piano when I was was a teenager.

10. He must before the bride.




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