動詞什么時候加ing？動詞加ing的幾種情況

1、動詞加ing做謂語情況

做謂語時動詞加ing前面必須加上be動詞,形成be+動詞ing(現(xiàn)在分詞)作句子謂語，構(gòu)成進(jìn)行時態(tài)句子。

例如:

He is reading a book now.

他正在看書.

He was watching TV when his mother came in.

他媽媽進(jìn)來時，他正在看電視。

They've been waiting for you for three hours.

他們等你三個小時了.

2、動詞加ing做非謂語情況

1、動詞作介詞的賓語要加ing(動名詞)

I'm looking forward to seeing you again.

我期盼著再次見到你.

The boy is so excited about hearing from his mother.

男孩為收到他媽媽的來信很興奮。

2、部分動詞用動詞做賓語。做賓語的動詞要加ing(動名詞)

I Practising speaking English Every day.

我每天練習(xí)說英語.

Could you mind opening the door?

你介意開門嗎？

I have finished reading three books.

我已經(jīng)看完三本書.

The old man Enjoys living in the country.

這老人喜歡住在農(nóng)村.

3、一些固定句式后面要加動詞ing(現(xiàn)在分詞)

We have fun Playing in the park on Sunday.

Most students have problems speaking English.

4、動詞修飾名詞做后置定語時，要加ing(現(xiàn)在分詞)

There is a boy Crying over there.

I felt something moving in the house.

I heard someone singing in the next room.

5、動詞做主語和表語時，動詞要加ing(動名詞)

Swimming is very popular in summer.

His job is teaching English.

綜上所述，動詞在以上六種情況需要加ing！