2019学年度选修七Unit Three Under The Sea Period4 Grammar教案

Teaching aims:

1. Students will be able to recognize the -ing / being done forms and know the exact meanings of them.

2. Students will be able to use these two forms correctly.

Step 1 Revision

Ask students to revise the text by answering some questions:

1) What did Clancy witness when he ran down to the shore?

2) Why did Clancy run in a hurry?

3) What did Old Tom do when they headed into the bay?

4) What did Old Tom do after George beat the water?

5) What did Clancy witness when they drew near?

Step 2 Grammar learning

1. 现在分词(--ing形式)的构成

V-ing形式由"do + ing"构成, 否定形式是"not doing", V-ing可以带宾语或状语构成V-ing短语, 没有人称和数的变化, 但有时态和语态的变化.

2. 动词-ing形式的被动式分为一般式和完成式:

1) 一般式：表示这个被动的动作正在进行或与谓语表示的动作同时发生.

2) 完成式：强调这个被动的动作在谓语动词所标示的动作之前完成.

语态

时态

主动语态

被动语态 一般式 (not) doing (not) being done 完成式 (not) having done (not) having been done

3. 动词---ing的被动式的句法功能.

1) 作主语：So being killed by sharks was a common thing.

2) 作宾语, 用在介词后或需要带-ing形式作宾语的动词后.

George didn't like being kept waiting.

He was terrified of being abandoned by us.

Do you remember having been taken to Beijing at the age of ten?

3) 作表语.

What worried the child most was his not being allowed to visit his mother in the hospital.

4) 作定语.

The problem being discussed is of great importance.

5) 作状语.

Having been shown around the library, we were taken to see the lab.

6) 作补足语.

As we drew closer, I could see a whale being attacked by a pack of about six other killers.

When we approached him, I saw James being held up in the water by Old Tom