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1、1动词不定式主动形式表示被动意义 1、 look ，feel ,smell, sound, taste 等系动词在句中做谓语 This coat feels very soft and smooth. Her voice sounds very pleasant. The dishes taste delicious. 2.有些动词做不及物动词，用来表示主语的内在品性或性质。 如：wash, clean, cook, iron, cut , sell, read, wear, feel , draw, write , sell 等 The book sells well. This knife
2、 cuts easily. My new pen writes well. 3.在 need , require, want , worth (adj )后的动名词可以主动表被动 The door needs repairing. This book is worth reading. Her mother is ill .She needs looking after. 4.在疑问词 what/which/whom+不定式结构中，主动表被动 I dont know which to choose . He asked me what to do . 5.在某些固定句型中, 动词不定式作定语,
3、 用主动形式表被动意义。1）have（give, show）sth. to do在这种句型中的不定式与前边的名词有动宾关系, 又和句中另一名词或代词构成主谓关系。例如: I have a lot of things to do this afternoon. to do 与 things 是动宾关系, 与 I 是主谓关系。否则, 在表示被动意义时, 仍需要被动式。试比较:Have you anything to do this afternoon? 今天下午你有事要做吗?（to do 是由 you 发出的）Have you anything to be taken to your parent
4、s? 你有要带给你父母的东西吗? （谁带不得而知）再如:Please get me something to read. 请给我弄点读的材料。Hell show you the right path to take. 他会给你指出要走的正确的路。There is much work to do. Have you any questions to ask? Would you like something to drink?2）It（This, That）beaanadj. n. to do在这种句型中, 不定式与前面的名词有动宾关系。动词不定式可改为动词不定式复合结构。例如: This is
5、 a difficult question to answer. 这是个难答的问题。question 与 to answer 为动宾关系。to answer 可改为 for me to answer。2再如:It is an easy sentence to translate. 这个句子很容易翻译。difficult , hard 等形容词作表语时，其后做状语的不定式用主动形式表被动。 The problem is easy to work out. The text is difficult to understand. The man is hard to please. 3）There
6、 be n. to do在此句型中, 用来修饰主语的不定式, 可用主动式, 也可用被动式, 只是侧重点不同。用主动式作定语, 重点在人, 用被动式作定语, 重点在物。例如:没有时间可以耽误。可译成:There is no time to lose（to be lost）. 用 to lose 可看成 for us to lose; 用 to be lost, 谁 lost time 不明确。但下述两句用主动不定式与被动不定式意义不同:a. There is nothing to do now. （We have nothing to do now. ）现在没事干。b. There is not
7、hing to be done. （We can do nothing now. ）现在没办法了。a. There is nothing to see. （nothing worth seeing）没有东西值得看。b. There is nothing to be seen. （nothing there at all）看不见什么东西。6.在某些“形容词不定式”的结构中, 不定式有被动意义, 与句子主语构成动宾关系。其句型有:1）n. beadj. to doThe question was very difficult to answer. 这问题很难回答。The job is very e
8、asy to do. 这工作很容易做。2）n. betooadj. to doThe thing is too small to see. 这东西太小看不见。This book is too difficult to understand completely. The tree is too tall to climb. I was too excited to say a word. 我激动得连一句话也说不出。3）n. be adj. enough to doThe box is light enough to carry. 这盒子轻得可带走。The book is cheap enoug
9、h to buy. 这本书很便宜可以买。但下列两句可用不定式的主动式, 也可用被动式:This plant is fit to eat to be eaten. 这种植物可以食用。The cake is ready to eat to be eaten. 这块饼可以吃了。7.某些动词, 如 to let, to blame （责备）, to seek（寻找）用主动式表被动意义。The house is to let. 这房子要出租。Who is to blame for it? 这得怪谁?The reason is not far to seek. 这理由不难找到。8. remain 表示“留
10、待以后”一般都用 sth. remain to be seen/done 的结构3练习: 选择填空。1. The chair looks rather hard, but in fact it is very comfortable to _.a. sit b. sit on c. be sat d. be sat on2. Im hungry. Get me something _.a. eat b. to eat c. to be eat d. for eating3. It is difficult for a foreigner _ Chinese.a. write b. to wri
11、te c. to be written d. written4. I have no more letters _, thank you.a. to type b. typing c. to be typed d. typed5. The car is rather difficult _.a. to repair b. to be repaired c. repairing d. being repaired6. He was nowhere _.a. to see b. to be seen c. seeing d. seen7. She had no money _ a birthday present for their children.a. to buy b. to be bought c. bought d. buying8. We waited for the work _.a. done b. being done c. to do d. to be done答案:15 bbbca 68 bad
