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4. She said that the experiment report would be finished in a few minuties.
5. Excuse the mess – the house is being painted.
6. When she came in, the meeting was being held and mr li was making an important speech.
7. Up till now many new houses have been completed in the earthquake stricken areas.
8. To his great surprise, he found the bridge had been washed away completely by the flood.
9. Something must be done to prevent?the?river?from?being?polluted.
二、?通过观察，归纳总结被动语态，并填写下表。
?
时??态结??构一般现在时?一般过去时?一般将来时?过去将来时?现在进行时?过去进行时?现在完成时?过去完成时?情态动词
三、看课件图示，归纳总
结主动语态变被动语的方法?四、用所给词的适当形式填空，从中发现问题并弄懂、巩固语法结构。
1.?The?students?_____?often?_____(tell)?to?take?care of their desks and chairs.
2. That play ________(put) on again sometime next month.
3. The old man is ill. he ______ (must send) to the hospital.
4. Vegetables, eggs and fruits_________ (sell) in this shop.
5. What ___ a knife ______ (make) of?
It _______________(make) of metal and wood.
6. A piano concert _____________(give) here last friday.
7. The room _____________ (clean) by me every day.
8. The stars _____________ (can see) in the daytime.
9. Some flowers __________(water) by li ming already.
10.?A?beautiful?horse?____??____??___?(draw)?by?john?next?day.
?
五．被动语态的几个特殊情况：
（一）?练习??a、改错?；??b、把主动句子变成被动
a.?1．?the?doctor?has?been?send.
2.?time?must?be?made?good?use?for.
3.?the?books?may?be?keep?for?two?weeks.
4.?he?must?being?prevented?prom?going.
b.?5.?we?gave?him?some?advece.