【語法透視】：含情態(tài)動(dòng)詞的被動(dòng)語態(tài)

1、 3/3【語法透視】：含情態(tài)動(dòng)詞的被動(dòng)語態(tài)1.含情態(tài)動(dòng)詞的被動(dòng)語態(tài)的基本結(jié)構(gòu)為“情態(tài)動(dòng)詞+be+及物動(dòng)詞的過去分詞”。Many trees should be planted on the mountains. 應(yīng)該在樹上植許多樹。Students should be allowed to go to school by bike.應(yīng)該允許學(xué)生們騎自行車上學(xué)。2.把含情態(tài)動(dòng)詞的主動(dòng)句變成被動(dòng)句，即把“情態(tài)動(dòng)詞+動(dòng)詞原形”改為“情態(tài)動(dòng)詞+be+過去分詞”，此時(shí)，作主語的要用動(dòng)詞承受者。We should clean the classroom every day. The classroom s

2、hould be cleaned every day. 3.句式的轉(zhuǎn)換(1)否定句：在情態(tài)動(dòng)詞后加not就行。These books cant be read for children. 這些書孩子們不能讀。(2)一般疑問句：直接將被動(dòng)語態(tài)的陳述句的情態(tài)動(dòng)詞提到的句首。Should Ann be allowed to wear her own clothes? 應(yīng)該允許安選擇自己的衣服嗎？(3)特殊疑問句：由疑問詞加上含有情態(tài)動(dòng)詞的被動(dòng)語態(tài)的一般疑問句構(gòu)成。When must my homework be handed in? 我的作業(yè)必須何時(shí)交？4.對含有情態(tài)動(dòng)詞的被動(dòng)語態(tài)的一般疑問句的回答

3、， 一般應(yīng)保留原句中的情態(tài)動(dòng)詞，但must表示“必須”時(shí)，其否定回答用neednt。Should my homework be finished today? 我的作業(yè)應(yīng)在今天完成嗎？Yes, it should./No, it shouldnt. 是的，應(yīng)在今天完成。/不，不應(yīng)在今天完成。Must the room be cleaned right now? 房間必須馬上打掃嗎？Yes, it must./No, it neednt. 是的，必須立即打掃。/不，不必立即打掃。典例題解例1Teenagers should to choose their own clothes. A. allo

4、w B. to allow C. be allowed D. allowed解析C。主語teenagers是動(dòng)作allow的承受者，再根據(jù)should確定要用情態(tài)動(dòng)詞的被動(dòng)語態(tài)，即“情態(tài)動(dòng)詞+be+過去分詞”。例2-What should we do first if we want to develop our village?-A lot of new roads , I think. A. have to build B. must build C. have built D. must be built解析D。new roads是動(dòng)作build的承受者，應(yīng)用被動(dòng)語態(tài)。含must的情態(tài)動(dòng)

5、詞的被動(dòng)語態(tài)為“must+be+情態(tài)動(dòng)詞”。例3This kind of food_cool, clean and dry according to the instruction. A. should be carried B. must be put C. should be placed D. must be kept解析D。根據(jù)句意，主語food是動(dòng)作的承受者，用被動(dòng)語態(tài)，而空格后的cool是形容詞，而“keep+某物+形容詞”意為“使保持狀態(tài)”，故選D。例4Smoking _ in public places, so dont smoke here. A. allows B. is

6、allowed C. doesnt allow D. isnt allowed解析D。主語smoking是動(dòng)作allow的承受者，排除A和C。由so dont smoke here可知這兒禁止吸煙，故選D。語法精練 I. 用括號內(nèi)所給單詞的適當(dāng)形式填空。1.How many magazines _(can borrow) in your library every week?2.In many countries, teenagers under 18 _(should not allow) to go into Internet bars. 3.Some people think trees

7、 _(should plant) on Tree planting Day only. 4.The flowers _(must water) every day. 5.A dictionary _(can use) in the exam. II.同義句轉(zhuǎn)換，每空一詞。1.Students should clean their classroom every day. Their classroom _ _ _ every day. 2.Can you mend this radio?_ this radio _ _?3.We should not allow fifteen-year-ol

8、ds to work at night. Fifteen-year-olds _ _ _ to work at night. 4.Who should be asked to volunteer at your local school? Who should _ _ to volunteer at your local school?5.They grow tea in the southeast of China. Tea _ _ in the southeast of China. III.根據(jù)漢語提示，完成下列句子。1.Many tall buildings _(可以看見)everywhere in our city. 2.All the work _(應(yīng)該做) as soon as possible. 3.Waste-paper _(不應(yīng)該扔)here. 4._rice_(能種植) in winter?5._the letters _(必須打) this afternoon?參考答案I.1.can be borrowed 2.shouldnt be allowed 3.should be planted 4.must be watered 5.can be used II.1.should be cleaned 2.Can, be