例12 ___twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city. A. Examining B. Examined C. Being examined D. Having been examined
解析：本题中is为系动词，前面应该作主语，用-ing形式，所以答案为C。
原则七、be+-ed+介词结构常可把be去掉保留-ed+介词做状语
例13Michael’s new house is like a huge palace, ______with his old one.
A. comparing B. compares C. to compare D. compared 解析：“和。。。相比较”结构为be compared with，现在做句子的状语，所以只保留非谓语动词，把动词be去掉，答案为D。
例14 _______ with a difficult situation, Arnold decided to ask his boss for advice.
A. To face B. Having faced C. Faced D. Facing
解析：“面对”结构为be faced with, 现在做句子的状语，所以只保留非谓语动词，把动词be去掉，答案为C。 原则八、非谓语动词作状语，其逻辑主语必须和句子主语保持一致，和句子主语构成主谓关系时用-ing形式，构成动宾关系是用-ed形式。其逻辑主语和句子主语不一致时，要在
非谓语动词前加逻辑主语，构成独立主格结构
例15． ____ twice, the postman refused to deliver our letters unless we changed our dog.
A. Being bitten B. Bitten C. Having bitten D. To be bitten 解析：本题考查非谓语动词作状语，其逻辑主语应和句子主语the postman一致，the postman应该是被咬，所以答案为B。
例16._______ in the fields on a March afternoon, he could feel the warmth of spring.
A. To walk. B. Walking C. Walked D. Having walked 解析：本题考查非谓语动词作状语，其逻辑主语应和句子主语he一致, he 和walk应该是主动关系，所以答案为B。 例17. While watching television, __________. A. the doorbell rang B. the doorbell rings
C. we heard the doorbell ring D. we heard the doorbell rings
解析：根据“非谓语动词作状语，其逻辑主语必须和句子主语保持一致”的原则，watching的逻辑主语应和后面句子主语一致，所以句子主语应为“we”，答案为C。
例18. The children went home from the grammar school, their lessons ____ for the day.
A. finishing B. finished C. had finished D. were finished
解析：本题没有连词，所以后面应用非谓语动词，the lessons是非谓语动词的逻辑主语，和非谓语动词构成独立主格结构。根据句意应是“被完成”，所以答案为B。
原则九、不定式做状语一般有两种：目的状语和出乎意料的结果状语（表示顺其自然的结果用-ing形式）。另外，某些形容词（表喜、怒、哀、乐）做表语后跟不定式可以表示原因 例19．_____, you need to give all you have and try your best.奇速英语公众微信号qisuen
A Being a winner B To be a winner C Be a winner D Having been a winner
解析：根据句意“要想成为获胜者，你要付出所有，尽最大努力”，此处表目的，所以答案为B。
例20. The news reporters hurried to the airport, only _______ the film stars had left. A. to tell B. to be told C. telling D. told
解析：本句句意为“记者们匆匆赶到机场，却被告知明星们已经走了”，表出乎意料的结果常常用only to do，所以答案为B。
例21. The glass doors have taken the place of the wooden ones at the entrance, ________ in the natural light during the day.
A. to let B. letting C. let D. having let
解析：本题句意为“玻璃门替换了木头门，自然光就进来了”，自然光进来时顺其自然的结果，所以用doing, 答案为B。 例22.How glad I am ___________ you! A. seeing B. to see C. saw D. having seen
解析： 本题是I am glad to see you 的感叹句形式，to see you 是原因状语，答案为B。
原则十、 非谓语动词的否定原则是在非谓语动词前加not，有not to do, not doing, not having done, not to have done几种形式
例23______that he was in great danger, Eric walked deeper into the forest.
A. Not realized B. Not to realize C. Not realizing D. Not to have realized
解析： 本题考查doing的否定形式not doing，答案为 C。 例24. What worried him most was ______ to visit his sick child.
A. his being not allowed B. his not being allowed C. his not allowing D. having not been allowed
解析：本题考查being done的否定形式not being done; his 为not being done的逻辑主语，所以答 案为B。
例25. Sarah has decided ________ away on holiday this
summer.
A. don’t go B. to not go C. not going D. not to go
解析：本题考查to do的否定形式not to do, 所以答案为D。 非谓语动词包括动词不定式，动词的过去分词和动词的-ing形式三种。这是高考中的热点，其考查量多、面广，几乎是必考的一个知识点。近六年高考复现率达百分之百。纵观试题，其考查重点为动词非谓语形式的作用及功能相同的非谓语动词之间的区别。学生对此知识也“知之半解”，深感头疼。请看下面的方法，将有助于记住不定式及动名词。 1、动词的不定式
①不定式有标记， to与动词连一起。 ②没有人称数变化， 动词特点它具备。 ③主宾定状表补语， 唯独作谓不可以。 ④not 加上不定式， 否定结构要牢记。 ⑤疑问词与不定式， 构成短语有意义。 ⑥仔细推敲多思考， 准确判断有依据。 解析：
①“to+动词原形”是它的基本构成形式，即不定式的标记。 ②它没有人称和数的变化，不管主语是任何人称，单数还是复数，动词不定式都没有变化。但它仍保留动词的特点，可以有自己的宾语或状语。
③它具有名词、形容词和副词三大特点，所以，它在句中可
以作主语、宾语、定语、表语、状语和宾补。
④“not +动词不定式”是它的否定形式，不要受其他否定式的影响，要记住规律。
⑤疑问代词what, who, whom, which和疑问副词where, when, why , how加上不定式在句中可以做主语，宾语、表语、状语。
⑥通过以上分析，只要仔细研究，把不定式的功能用法搞清楚，在应用时就能作出准确的判断。 2、动名词：
哪些动词后面只能接动名词，下面的顺口溜有助于记忆。 喜欢、考虑不可免（enjoy, consider, escape, avoid） 停止，放弃太冒险（stop, give up , risk） 反对想象莫推延（mine, imagine, delay, put off） 要求完成是期望（require, finish, look forward to.） 建议继续勤*练（suggest, go on, practise） 不禁原谅要坚持（can’t help, excuse , insist on） 继续注意使成功（keep on, mind, succeed in）