3.独立结构：

Weather permitting (If weather permits), we'll have a sports meet

next week.

Weather being so fine (As weather is so fine), we have decided to

go on an outing.

There being no buses, we had to walk home.

4.with复合结构：

They slept, with the lights burning.

高考新剖析

1. Nowadays people sometimes separate their waste to make it

easier for it _________.［2009年高考湖南卷］

A. reusing B. reused

C. reuses D. to be reused

2. Schools across China are expected to hire 50,000 college

graduates this year as short-term teachers, almost three times

the number hired last year, __________reduce unemployment

pressures.［2009年高考江苏卷］

A. help B. to have helped

C. to help D. having helped

C

3. Distinguished guests and friends, welcome to our school.

__________the ceremony of the 50th Anniversary this morning

are our alumni(校友)from home and abroad.

［2009年高考江苏卷］

A. Attend B. To attend

C. Attending D. Having attended

4. They use computers to keep the traffic__________ smoothly.

［2009年高考全国卷Ⅱ］

A. being run B. run C. to run D. running

5. Now that we've discussed our problem, are people happy with

the decisions_________？［2009年高考全国卷Ⅰ］

A. taking B. take C. taken D. to take

6. If there's a lot of work_________, I'm happy to just keep on

until it is finished. ［2008年高考上海卷］

A. to do B. to be doing

C. done D. doing

C