(
课件网) 不定式 1.动词名词化（主语，宾语，表语，同位语） 2. 宾语补足语，状语，定语 ，独立成分 3. 不定式的省略 4.不定式的形式（否定式，时态，语态，主动表被动） 不定式（短语）作主语 To love is to be loved. 爱别人就是被人爱。 To teach is to give. 教书就是奉献。 注意： 前后一致 Tips: (1)在口语中，动词不定式作主语时常用形式主语it，而真正的主语则被置于句子后部。 It is of great importance to solve the housing problem. 解决住房问题是很重要的。 It will take me three hours to do this job. 干这个工作我花了三个小时。 It is + adj. \ n. + to do sth. It is no use \ good, not any use \ good, useless doing sth. (2)假如动词不定式要带逻辑主语，则需用介词of 或for来引导。 It's good for me to have a talk with you. 我很高兴和你交谈。 It is cruel of man to kill animals in such a casual manner. 人类如此随便地屠杀动物，真是残忍。 区别： 句型的转换 sb be + adj. + to do sth. 能用于介词of结构的形容词有： good, nice, kind, bad, cruel, wicked, clever, bright, wise, silly, foolish, stupid, selfless,sensible, selfish, insensible, polite, fair, generous, rude, unfair, mean等。 这些形容词主要表示做这件事的人的品格或素质。 能用于介词for 结构的形容词有：important, necessary, impossible, better, worse, easy, difficult heavy, light等。 动词不定式（短语）作宾语 只能接to do 的动词及短语 manage ，afford，make up one’s mind等 只能接doing 的动词及短语 admit, imagine, give up, can’t stand等 既能接to do又能接doing的动词，两者的区别 forget, regret, stop, try, go on等 注意 allow, permit, forbid, advise, 的用法 We don’t allow students to smoke. allow sb. to do sth. We don’t allow smoking here. allow doing sth. 动词不定式（短语）作表语 My job is to help the patient. 特殊疑问词 + 不定式 在句中起名词的作用，可充当主语、宾语、表语等 He didn’t know what to say. Where to go is not decided. 动词不定式（短语）作宾语补足语 （1）能够带复合宾语的动词： make, keep, leave, have, find, see, notice 等 Leave him to do it himself. 让他自个儿去做。 （2）在一些动词后，用作宾语补语的动词不定式符号to 要省略掉。这类动词包括感官动词以及使役动词：feel, observe, see, hear, watch, notice, have, make, let 等。 I heard her sing a song in the next room yesterday. 我昨天听见她在隔壁唱过一首歌。 I had John fix my bike. 我让约翰修理我的自行车 （3）但如果句子为被动语态，动词不定式（短语）要带to（let 除外）。 She was heard to sing a song in the next room yesterday The boy was made to go to bed early. 这男孩被迫早上床睡觉。 （4）有些动词后面的宾语补语常常是to be，这样的动词有：believe, consider, declare, imagine ,know ,prove , understand , find , suppose等 I will consider him to be an honest man. 我会认为他是一个诚实的人。 She was believed to be innocent. 大家都相信她是清白的。 动词不定式（短语）作定语 动词不定式（短语）作定语需后置; 与所修饰的词有动宾关系或主谓关系。 （1）当被修饰的名词前有最高级，序数词，the only等强调结构修饰时，或被修饰的词是不定代词如everything, anything, much, little 等时，非谓语动词作定语则只能用动词不定式。 He was the last to realize the import ... ...
