Agriculture is the country's chief source of wealth, wheat _____ by far the biggest cereal crop.

A. is B. been C. be D. being

Key: D

本題考的是獨立主格結構。

我們要來復習的就是獨立逐個結構.

1）名詞/ 代詞+ 分詞

The foreign travelers had many talks with the natives, the guide acting as an interpreter.

He being absent, nothing could be done.

The floor being wet and slippery, we stay outside.

All things considered, I think I ought to award the job to Mrs. Smith.

•1. 獨立主格結構的語法形式是：主語+非謂語動詞。

•2. 非謂語動詞有三種：（1）to + v.

• （2）v. –ing

• （3）v. –ed

•3. 非謂語動詞的特點：

•1) 時間關系：

• （1） 不定式具有后時性

• （2） –ing 分詞具有同時性

• （3） –ed 分詞具有先時性

e.g. Here are the first two volumes, the third one to come out next month.

They visited Danxia Mountain yesterday, Miss Lee acting as the tourist guide.

His work done, he went home.

2）邏輯主語與非謂語動詞的關系：

(1) –ing分詞表主動

(2) –ed分詞表被動

e.g. He being sick in bed, the team had to find a replacement.

Weather permitting, we will go picnicking this weekend.

The friendly match being over, the players of the two countries shook hands with each other.

All the tickets sold out, they returned home disappointed.

The dispute settled, the meeting came to an end.

His voice drowned by the noise, the speaker interrupted his lecture.

現在你對獨立主格的結構了解多少呢?

(1) 找出非謂語動詞的邏輯主語

(2)弄清楚非謂語動詞與邏輯主語的主被動關系

(3) 弄清楚非謂語動詞與主句動詞的時間關系

那么我們現在來做幾道練習吧!

1. The old writer could not sleep at night, his wrongs and sorrows ____ him no peace.

A. gave B. have given C. being given D. giving

2. Television has become as major instrument of communication, ____ us to see as well as to hear all kinds of programmes.

A. to permit B. permitted C. being permitting D. permitting

3. The decision ____, what is to be done now is how to carry it out.

A. been made B. has been made C. having been made D. having been making

4. Some people are sitting on the grass; others are strolling along the lake side, _____.

A. chatting and to laugh B. to chat and to laugh C. chatting and laughing D. chatting and laughed

5. I was overjoyed at the news of my hometown ____ so much progress.

A. to make B. to have made C. made D. having made

答案：1-5DDCCD