mba考试科目英语语法：被动语态常用于下列几种情况：
　　一、动作的执行者无需指出或不明确时
　　Printing was introduced into Europe from China.
　　Rome was not built in a day.
　　二、为了强调动作的承受者
　　Four people were killed and thirty-one injured in the bomb attack.
　　Susan was singled out for praise yesterday.
　　三、为了修辞的需要
　　He started to complain about this wicked world but was interrupted by a knock at the door.
　　Yesterdayu he visited our university and was welcomed by the President.
　　[提示]
　　1. 除及物动词外， 一些相当于及物动词的短语动词也可作用被动态形式， 除个别情况外， 短语动词一般不拆开使用。
　　This matter will be dealt with as soon as possible.（短语）
　　2. 不及物动词（或相当于一个不及物动词的短语动词）和表示状态的动词（或短语动词）无被动态形式， 如happen, rise, occur, take place, break out等； 以及lack, fit, suit, equal, become, resemble, befall, consist of,look like等。
　　The story took place in 1949.
　　3. 将主动态形式改为被动态形式时如遇到动词后跟双宾语的情况， 我们只能将其中之一变成主语， 另一个保持不变。当直接宾语变成主语时， 保持在原位的间接宾语前需加介词to.
　　I gave my hasband a tie as a birthday pressent.
　　→My hasband was given a tie as a birthday present.
　　→A tie was given to my husband as a birthday present.
　　Exercises 2 Choose the best answer to complete the following sentences:
　　1. The professor was knowledgeable and eloquent and ___B_______ with enthusiasm.
　　A. was always listened B. was always listened to
　　C. always was listened D. always listened to
　　2. He returned a week later and found his house ____D______ .
　　A. has broken into B. was broken into
　　C. to be broken into D. has been broken into
　　3. The United Kingdom _____C_____ Great Britain and Northern Ireland.
　　A. consisted of B. is consisted of
　　C. consists of D. consist
　　4. These oranges ______B____ nice. （smell feel taste主动形式可表被动）
　　A. are tasted B. taste
　　C. is tasted D. tastes
　　5. In 1950, she was the largest ship that ______D____ .
　　A. was ever built B. has ever built
　　C. has ever been built D. had ever been built
　　6. The house suddenly collapsed while it ____C______ down.
　　A. was pulled B. pulled
　　C. was being pulled D. had been pulled
　　7. “How do you like your new position?” “I ____B______ .”
　　A. don't satisfy B. am not satisfied（状态）
　　C. can't satisfy D. haven't satisfied
　　8. The sixth generation computers, with artificial intelligence,
　　________D__ and perfected now.
　　A. developed B. will have been developed
　　C. have developed D. are being developed
　　9. There are more than fifty proposals ___B_______ at the conference.
　　A. discussed B. to be discussed
　　C. discussing D. having discussed
　　10. Though Newton was a great scientist, many of his ideas
　　________D__ today and are being modified by the work of today's scientists.
　　A. are to challenge B. are challenging
　　C. may be challenged D. have been challenged