1. 不定式的被动语态
由“ to be+过去分词”构成。如：
He needs to be taken care of. 他需要人照顾。
Not a sound was to be heard. 听不到一点声音。
It ' s better to be prepared than unprepared. 有准备比没有准备好。
【注】有时用不定式的完成体被动式（to have been+ 过去分词）：
I should like to have been told the result earlier. 我本想让人把结
果早点告诉我。
2. 现在分词的被动语态
由“ being+ 过去分词”构成。如：
The building being repaired is our library. 正在维修的那座楼是我们
的图书馆。
Being protected by a wall ，he felt quite safe. 有一堵墙保护，他感
到很安全。
He was seen being taken away by the police. 有人看见他被警察带走了。
【注】有时用现在分词的完成体被动式（having been+ 过去分词）：
Having been invited to speak, I 'll start making preparations tomorrow. 因为邀请我去讲话，我明天就得做准备。
3. 动名词的被动语态
由“ being+ 过去分词”构成。如：
She likes being looked at. 她喜欢被人瞧
He objected to being treated as a child.
他反对被当成孩子看待
This question is far from being settled.
这个问题远没解决。
4. 过去分词没有被动式过去分词本身可以表示被动意义，但它没有相应的被动语态形式。如：
The door remained locked. 门仍然锁着。
非謂语动词（一） 一、Done 被动性：过去分词的逻辑主语是分词动作的承受者（receiver）, 而不是发出者，两者构成被动语态或被动意义。 完成性：与句中另一个动作、另一个时间或句子产生的时间相比，分词的动作已经发生、完成。 句法功能 表语：许多动词通过+ed 变成形容词，其本质是过去分词用作形容词The boys were astonished. The door remained locked. They seemed worried. 定语：划出下列句子的定语部分 The broken glass is still lying on the table. The frightened girl was trembling when the police arrived. A grown boy is a boy who has physically and mentally grown up. He sent them his newly-invented devices. She was reading a novel written by Dickens. The people trapped in the big fire were rescued by the firefighters with a helicopter. The radio bought in your shop doesn't work well. 翻译： 他是被经理测试的人员当中最优秀的员工之一。 宾补 1、在感官/ 感知动词后：see, look at, observe, hear, listen to, think, find, imagine, feel, watch等。 We found him greatly changed. 2、在使役动词后：make, have, get, keep, leave等。 He made himself understood in spoken English. 3、在意愿动词后：like, need, want, wish等。 She came into the shop with a package saying: I needn’t it changed but re-wrapped. 翻译：我回到家，发现家里被偷了
非谓语动词用法归纳 一、表格的用法 1. doing 的用法 （1）在要求动词后（作宾语）：avoid 避免appreciate 感激/欣赏acknowledge 承认/自 认admit 承认advocate 提倡/ 主张consider 考虑can't help 不禁can't stand 受不了contemplate 细想complete 完成confess 坦白dislike 不喜欢，讨厌deserve 值得delay 延迟deny 否认dread 可怕defer 拖延detest 嫌恶enjoy 享有/喜爱envy 嫉妒endure 忍受excuse 借口escape 逃跑/ 逃避finish 完成forgive 原谅fancy 幻想/ 爱好favor 造成/ 偏爱figure 描绘/ 计算hate 讨厌imagine 设想involve 卷入/ 包含keep 保持miss 错过mention 说到/ 讲到mind 介意pardon 原谅/ 饶恕permit 允许postpone 推迟practice 实行/实践prevent 阻止quit 放弃停止risk 冒险recall 回想resist 抵抗/ 阻止resume 恢复repent 悔悟resent 怨恨stand 坚持/ 忍受suggest 建议save 营救/ 储蓄tolerate 忍受
worth 值得 You should try to avoid making mistakes. The book is worth reading. The book deserves reading. （2）表进行 Walking on the grassland, I saw a snake.=When I was walking on the grassland, I saw a snake. The man speaking English is Tom. = The man who is speaking English is Tom. （3）表主动 The man speaking English is Tom = The man who speaks English is Tom. = The man who spoke English is Tom. Nobody dinks boiling water but boiled water.= Nobody dinks water that is boiling but the water that has boiled. （4）表伴随 I stand outside waiting for Mr. Chen. I lie in bed reading a novel. （5）表性质；特点 The film is very moving. She is understanding, so you had better discuss your business with her. 6）概括性, 一般性 Climbing mountain is very interesting.
非谓语动词讲解 非谓语动词: a.动词不定式 b.动名词 c.分词( 现在分词过去分词) 概述：1.谓语动词：在句子中担任谓语的动词 2.非谓语动词：是动词的特殊形式，在句中可以作除谓语外的所有成分 非谓语动词使用条件 一个句子当中，已经存在一个主句（谓语动词）,又没有连词的情况下, 还有别的动词出现时。She got off the bus, leaving her handbag on her seat. She got off the bus, but left her handbag on her seat. 动词不定式 一．动词不定式的时态和被动形式 动词不定式是非谓语动词的一种，由不定式符号(to)加动词原形构成。不定式的形式有五种：1．一般式to do 例如：I like to read English. 2．进行式to be doing 例如：He seemed to be reading something at that time. 3．完成式to have done 例如：He seemed to have cleaned the room. 4．被动式to be done 例如：The work is to be done soon. 5．完成被动式to have been done 例如：The boy is said to have been sent to hospital yesterday. 二. 动词不定式的用法 I.作主语 (1)不定式做主语时，可以直接放在谓语动词之前。 To see is to believe．Not to get there in time is your fault. (2)注：常用it做形式主语，将to do放在位于之后，使句子保持平衡。 句型1：It + 谓语+ to do It takes us an hour _to__ get there by bus.
非谓语动词作状语之分词作状语 一、考点风向标 高考完形填空、阅读理解中（长难句分析） 怎么考高考语法填空中（已给单词正确形式填空） 高考短文改错中 运用在高考作文中，必得高分 二、考场点将台 动词不定式（to do） 非谓语动词作状语现在分词（doing） 过去分词（done） 构成形式： 总结： 分词做状语（时间、原因、结果、条件、让步、方式、伴随等）：doing 与句子主语是主动关系，表示与谓语动词同时或基本同时发生having done 与句子主语是主动关系，表示先于谓语动词发生
done与句子主语是被动关系，表示完成 being done与句子主语是被动关系，表示与谓语动词同时发生，一般在句首做原因状语 having been done与句子主语是被动关系，表示先于谓语动词发生 三、开始练兵 请观察下列例句，找出非谓语动词，并且判断做什么成分 1. Asked why he did it，he said it was his duty. ( ) 2. Hearing the news, they immediately set off for shanghai.( ) 3. He wandered down the street, not knowing where to go. ( ) 4. His parents died in the war, leaving him an orphan. ( ) 5. Knowing where I live，he never comes to see me. ( ) 6. The old man got on the bus, supported by a girl. ( ) 7. Having finished his homework, Tom went to play basketball. ( ) 8. Having been told many times, he still repeated the same mistakes. ( ) 9. Working hard, you’ll succeed one day. ( ) students came into the classroom, talking and laughing. ( ) 11. Being repaired now，this classroom can not be used. ( ) TIPS:仔细观察主从句的结构，看看它和复合句有什么区别 总结归纳： （1）非谓语句式特点复合句句式特点 1. 非谓语动词+句子 1. 主句+连词+从句 2. 句子+非谓语动词 2. 连词+从句+主句
专业.专注. 非谓语动词（the Non-Finite Verbs ） 定义在句子中不是谓语的动词， 形式：不定式、动名词和分词（现在分词和过去分词） 作用：在句子中充当主语、宾语、状语等。 特点：1.非谓语动词可以有名词作用 （如动词不定式和动名词），在句中做主语、宾语、表语。 2. 非谓语动词可以有形容词作用 （如动词不定式和分词），在句中做定语、表语或宾语补足语。 3. 非谓语动词可以有副词作用 （如动词不定式和分词），在句中作状语。 4. 谓语动词在句中作谓语，受主语的人称和数的限 制；非谓语动词在句中不能单独作谓语 ，它不受主语的人称和数的限制 5. 英语中不能单独做句子的谓语 。 与谓语动词的关系相同点 （1）如果是及物动词都可与宾语连用 ，例如： They built a garden. （2） 都可以被状语修饰： The suit fits him very well. The suit used to fit him very well. He avoided being punished by his parents. （动名词的被动式 ） Having written the composition, we handed （现在分词的完 it in.boss ordered them to start the work. （动 The 词不定式的逻辑主语 ） 不定式 一、形式功能： 动词不定式：（to ）+do ，具有名词、形容词、副词的特征。 否定式：not + （to ） do 以do 为例，动词不定式的构成如下： （1） 一般式：不定式的一般式所表示的动作与谓语动词动作同时发生或发生在谓语动词动作之后 例如： rm nice to meet you. 很高兴见到你。 He seems to know a lot. 他看起来懂得很多 。 We plan to pay a visit. 我们计划花钱去参观 。 He wants to be an artist. 他想成为一个艺术家 。 The patient asked to be operated on at once. 病人要求马上手术 。 The teacher ordered the work to be done. 老师要求完成工作 。 （2） 进行式：不定式的进行式所表示的动作与谓语动词动作同时发生 ， 例如：The boy pretended to be working hard. 男孩假装工作得很努力 。 He seems to be reading in his room. 看起来他正在他的房间里面读书 。 He was punished by his parents. （谓语动词被动语态） We have written the composition. （谓语动词的完成 时） 成式） （4）都可以有逻辑主语 They started the work at once. （谓语动词的逻辑主语） They suggested building a garden. We being League member, the work was well done. （现在分词的逻辑主语） （3） 都有主动与被动，体"'式（一般式；进行式；完成式）的变化。例如： We are League members. （谓语动词的主语）
1.These model cars _____in China in 2013. A.are made B.were made C.make D.made 2. Over $30000_______for a children’s hospital by a British girl several moths ago. A.is raised B.was raised C.will be raised D.has been raised 3.Martin was so busy _____the old that he gave up his part –time job. A.helping B.helped C.to help D.help 4.The novel ____by many people today. A.is read B.are read C.reads D.were read 5.My parents didn’t allow me ____to the party. A.go B.to go C.goes D.went 6.I will try my best to stop my son from ______the same mistake. A.make B.made C.makes D.making 7.-How clean your car is! -Thank you.It ____very often. A. is washed B.washes C.was washed D.washed 8.Pukou Railway Station ______in 1911 and it has become a filming location for films and TV plays in recent years. A.build B.is built C.built D.was built 9/-What’s wrong with Simon? He isn’t at school today. -His legs hurt. He was____by a motorcycle this morning. A.treated B.hit C.operated D.cured 10.Sarah,you’d better drink more water after____for such a long time. A.run B.runs C.to run D.running 11.Many houses ____by the earthquake and thousands of people were left homeless. A.damaged B.were damaged C.were damaging D.are damaged 12.My time in the middle school was one of____periods of my life. A.exciting B.more exciting C.the more exciting D.the most exciting 13.Chengdu is a greener city now because more and more trees ____every spring. A.were planted B.are planted C.will be planted 14.It’s necessary for us ____to our parents when we have problems. A.to talk B.talking C.talk 15.-Don’t smoke here,Dad.Smoking_____in public places. -Oh,sorry. I’ll stop right now. A.isn’t allowed B.aren’t allowed C.doesn’t allow 16.So far,the AIIB(亚投行)_____57 countries to be the founding members. A.attracted B.has attracted C.will attract 17.When you_____a difficult task,try to continue with it and finish it. A.give B.are giving C.gave D.are given 18.Doing eye excercises ___one of the useful ways to protect our eyes. A.is B.are C.were 19.I wonder when Subway Ⅱin Harbin____.When the day comes,I’ll spend less time going to school every day. A.is finish B.will be finished C.was finished
非谓语动词(the Non-Finite Verbs) 定义在句子中不是谓语的动词， 形式：不定式、动名词和分词（现在分词和过去分词） 作用：在句子中充当主语、宾语、状语等。 特点：1.非谓语动词可以有名词作用（如动词不定式和动名词），在句中做主语、宾语、表语。 2.非谓语动词可以有形容词作用（如动词不定式和分词），在句中做定语、表语或宾语补足语。 3.非谓语动词可以有副词作用（如动词不定式和分词），在句中作状语。 4.谓语动词在句中作谓语，受主语的人称和数的限制；非谓语动词在句中不能单独作谓语，它不受主语的人称和数的限制。 5.英语中不能单独做句子的谓语。 与谓语动词的关系相同点 （1）如果是及物动词都可与宾语连用，例如：They built a garden. They suggested building a garden. （2）都可以被状语修饰：The suit fits him very well. The suit used to fit him very well. （3）都有主动与被动, “体”式（一般式；进行式；完成式）的变化。例如： He was punished by his parents.（谓语动词被动语态）He avoided being punished by his parents.（动名词的被动式） We have written the composition.（谓语动词的完成时）Having written the composition, we handed it in.（现在分词的完成式）（4）都可以有逻辑主语 They started the work at once.（谓语动词的逻辑主语）The boss ordered them to start the work.（动词不定式的逻辑主语） We are League members.（谓语动词的主语）We being League member, the work was well done. （现在分词的逻辑主语） 不定式 一、形式功能： 动词不定式：（to）+do，具有名词、形容词、副词的特征。 否定式：not + (to) do 以do为例，动词不定式的构成如下： （1）一般式：不定式的一般式所表示的动作与谓语动词动作同时发生或发生在谓语动词动作之后. 例如：I'm nice to meet you. 很高兴见到你。 He seems to know a lot. 他看起来懂得很多。 We plan to pay a visit. 我们计划花钱去参观。 He wants to be an artist. 他想成为一个艺术家。 The patient asked to be operated on at once. 病人要求马上手术。 The teacher ordered the work to be done. 老师要求完成工作。 （2）进行式：不定式的进行式所表示的动作与谓语动词动作同时发生， 例如：The boy pretended to be working hard. 男孩假装工作得很努力。 He seems to be reading in his room. 看起来他正在他的房间里面读书。 （3）完成式：不定式的完成式表示的动作发生在谓语动词动作之前，例如： I regretted having told a lie. 我后悔我说谎了。 I happened to have seen the film. 我偶然看过这部电影。 He is pleased to have met his friend. 他很高兴能遇上他的朋友。 二、不定式的句法功能： （1）作主语： To finish the work in ten minutes is very hard. 十分钟之内完成这项工作是很难的。 To lose your heart means failure. 灰心意味着失败。
英语非谓语动词专项习题及答案解析及解析 一、单项选择非谓语动词 1．（北京）During the Mid-Autumn Festival, family members often gather together _________ a meal, admire the moon and enjoy moon cakes. A．share B．to share C．having shared D．shared 【答案】B 【解析】考查非谓语动词。句意：在中秋节期间，家人们通常会聚在一起吃饭，赏月，品尝月饼。gather是谓语动词，“_________ a meal, admire the moon and enjoy moon cakes”是状语，家人聚在一起的目的是吃饭，赏月，品尝月饼，表目的用动词不定式，故B选项正确。 点睛：动词不定式可以做主语，状语，定语，宾语，表语等。动词不定式做目的状语时，可以置于主句之前也可以置于主句之后，通常译为“为了”。 2． the course very difficult, she decided to move to a lower level. A．Find B．Finding C．To find D．Found 【答案】B 【解析】 【详解】 考查非谓语动词。句意：在发现课程非常难的同时，她决定转移到较低层次。find与主语是逻辑主谓关系，应使用现在分词，表主动和进行，做伴随状语。故选B。 【点睛】 首先要分析句子知道非谓语动词是做的什么成分，然后根据和修饰语的关系决定是现在分词还是过去分词或者不定式。这题是做伴随状语，she和find是主动关系，用现在分词做状语。 3．Walter offered us a lift when he was leaving the office, but our work _______, we refused his offer. A．not finishing B．had not been finished C．not having finished D．not finished 【答案】D 【解析】 试题分析：在这里，our work处在逗号位置，作整个句子的原因状语，这里应填非谓语动词。work和finish存在逻辑上的被动关系，所以应该用过去分词，故选D。 考点：独立主格结构的考查 点评：独立主格结构（Independent Genitive）由两部分组成，前一部份是名词或者代词，后一部分是非谓语动词(不定式、动名词和分词)或形容词、副词、或介词短语。前后两部分具有逻辑主谓关系。独立主格结构在句中做状语，多用于书面语。独立主格结构本身不
非谓语动词之动词ing 1．A new law will go into effect on August 1st.According to this law，people found ______“harmful”advertisements in the streets will be punished strictly. A．putting up B．to put up C．being putting up D．having put up 2．Time should be made good use of ______ our lessons well. A．to learn B．learning C．learn D．learnt 3．With trees and grass ______ 39.6%of the urban area，the city of Weifang has taken on a new look. A．covered B．covering C．to be covered D．being covered 4．______ alone in the large house，the little boy had to learn to survive by himself. A．To leave B．Leaving C．Left D．Being left 5．The firm was successfully run and ______，he owed his success to the support of his friends. A．looking back B．looked back C．to look back D．when looked back 6．Taiwan leader Ma Ying-jeou estimated on Friday that more than 500 people had died in floods a nd mudslides ______ by Typhoon Morakot. A．caus ed B．causing C．being caused D．to be caused 7．The scientist was rewarded by the government for ______ such a great contribution to the country. A．make B．making C．being made D．having made 8．Nearly half a million people are believed ______ their homes as a result of the disaster. A．to leave B．to be left C．to be leaving D．to have left 9．—Why are you looking pleased? —Oh，I’ve just had a job______. A．to offer B．offering C．offered D．to be offered 10．After the party，most guests left，with only two of them ______ in the host family，______ him cleaning up. A．remaining；helped B．remaining；helping C．remained；helped D．remained；helpi ng 11．For English teachers ______ a more effective role in teaching，they must make every effort to raise students’ cross-cultural awareness. A．to play B．playing C．having played D．play 12．Something as simple as _____ vegetables in childhood may help to protect you against serious illness in later life. A．to eat B．eating C．to be eating D．eaten 13．When I went in，my pet happened ______ on my bed，______TV. A．to be lying；watching B．to have lain；watch C．to lie；and watched D．to be laying；watching 14．Friends are like leaves，______ everywhere，but true friends are like diamonds，precious and rare. A．to find B．finding C．found D．being found 15．_____at my classmates’faces，I read the same excitement in their eyes. A．Looking B．Look C．To look D．Looked 16．The next thing he saw was smoke ______ from behind the house. A．rose B．rising C．to rise D．risen 17．Look over there—there’s a very long，winding path ______ up to the house. A．leading B．leads C．led D．to lead 18．Recently a sur vey_____ prices of the same goods in two different supermarkets has caused heated deba te among citizens. A．compared B．compari ng C．compares D．being compared 19．Bats are surprisingly longlived creatures，some______ a life span of around 20 years. A．having B．had C．have D．to have 20．Sit down，Emma. You will only make yourself more tired，______ on your feet. A．to keep B．keeping C．hav ing kept D．to have kept 21．Do you wake up every morning ______ energetic and ready to start a new day? A．feel B．to feel C．feeling D．felt 22．More highways have been built in China，______ it much easier for people to travel from one place to another. A．making B．made C．to make D．having made 23．On receiving a phone call from his wife ______ she had a fall，Mr.Gordon immediately rushed home from his office. A．says B．said C．saying D．to say 24．Sarah pretended to be cheerful，______ nothing about the argument.
非谓语动词用法详解 动词的非谓语形式有三种：不定式、动名词和分词 (一)不定式 不定式由“to十动词原形”构成，其否定形式是“not to do”．不定式可以带宾语或状语构成不定式短语，没有人称和数的变化，但有时态和语态的变化．不定式可作主语、宾语、状语、表语和定语，但不能单独作谓语．不定式的逻辑主语有时用“for十名词或代词宾格”构成． 1．不定式的用法： l)作主语．不定式短语作主语时，往往放在谓语之后，用it作形式主语．例如： To see is to believe． It is right to give up smoking． 2)作宾语．不定式短语作宾语时，如果还带有宾语补足语。往往把不定式宾语放在宾语补足语之后，而用it作形式宾语．例如： He wanted to go． I find it interesting to study work with him. 3)作宾语补足语．例如： He asked me to do the work with him. 注意：在feel，hear，listen to，look at，notice, observe，see，watch，have, let，make等词后的补足语中，不定式不带to．但是这些句子如果变成被动结构时，就必须带to．例如 I often hear him sing the song． He is often heard to sing the song． 注意：不定式动词在介词but，except，besides后面时，如果这些介词之前有行为动词do的各种形式，那么，这些介词后的不定式不带to，否则要带to．如： She could do nothing but cry. What do you like to do besides swim? I have no choice but to go． 动词help之后，带to或不带to都可以。 Will you please help me (to) take this suitcase? 请你帮我提一下这个衣箱好吗？She often helps her mother (to) clean their house. 她经常帮助她妈妈打扫房子。 4)作定语．例如： I have some books for you to read． 注①作定语的不定式如果是不及物动词，或者不定式所修饰的名词或代词是不定式动作的地点、工具等，不定式后面须有相应的介词．例如： He is looking for a room to live in． There is nothing to worry about．
非谓语动词就是不能作句子谓语而具有其他语法功能的动词。 主语/表语： 不定式和ing分词均能作主语，二者有何区别？ 1.表示某一具体的动作时，多用不定式；表示比较抽象的一般行为倾向的，多用动名词。 2.动名词作主语时通常位于句首；不定式作主语时常置于句末，用it作形式主语放在句首。 1) Smoking is prohibited(禁止)here. 2) It is not very good for you to smoke so much. Seeing is believing. To see is to believe. 若主语和表语都是非谓语动词, 应保持形式上的一致。
宾语： 1. 有些动词后只跟不定式作宾语，如： …… manage, promise, pretend, plan, offer, agree, ask, dare, choose, fail, help(帮助)，want(想要) , refuse等。 决心学会想希望，拒绝设法愿假装。 主动答应选计划，同意请求帮一帮。 2. 有些动词后只跟动名词作宾语，如： ……practise, appreciate, dislike, excuse, forgive, keep, resist, risk, deny, advise, fancy, complete, forbid, permit, allow, stand, refer to, give up, lead to, take to, set about, get down to, object to, succeed in, have difficulty in... 考虑建议盼原谅，承认推迟没得想。 避免错过继续练，否认完成就欣赏。 禁止想象才冒险，不禁介意准逃亡。 3.有些动词如begin, start; love, like, hate, prefer后既可以跟不定式又可以跟ing分词作宾语，意义上无多大区别(但ing分词一般表示经常性的行为；不定式表示具体的行为)。 4.有些动词后既可以跟不定式，又可以跟动名词作宾语，但意义上有明显差别。go on (stop/remember/regret)to do/doing can’t help to do / doing try to do/ doing mean to do（打算）/ doing（意味）be used to do / doing ( get used to doing)(used to do) 5.动词need, require, want作“需要”，deserve作“应受，应得”，主动表被动 定语： 不定式、ing 分词和过去分词都可以作定语，主要区别在于它们的时态意义和语态意义。 分词作定语与动词不定式作定语的区别是：现在分词表示主动、进行之意；过去分词表示被动与完成；而不定式表示在谓语动词表示的动作之后即将发生的动作。 不定式用来修饰序数词、最高级或no, all, any等限定词的中心词，表主动关系。 E.g.: The car to be bought is for his sister. / He was the best man to do the job. The houses being built are for the teachers. Developing countries/ developed countries 补语： 1.能接带to的不定式作宾语补足语和主语补足语的动词有：ask, advise, tell, force, get, allow, want, wish, like, hate, prefer, intend,expect, encourage, persuade, permit, request,order, warn, cause等。 Think, consider, believe, suppose, feel等后常用“to be....”作补语。 E.g.: You are not allowed to smoke here. People considered him to be a great leader. 2.使役动词，感官动词接不带to 的不定式作宾语补足语。常见的使役动词有make, let, have等；感官动词有see, hear, watch, observe, notice, feel以及look at, listen to等。 ◆“吾看三室两厅一感觉”---5看（look at, see, watch, notice, observe）3使（make,
非谓语动词 非谓语动词包括不定式(to do)、动名词(－ing)、现在分词(－ing)与过去分词(－ed)。它们不受主语人称和数的限制，在句子中不能充当谓语，但可以充当句子的其他成分，并且有时态和语态的变化。 动词不定式
定义：动词不定式是非谓语动词的一种，它没有人称和数的变化，在句子中不能独立作谓语，但它仍保持动词的特点，可以有自己的宾语和状语。 一、不定式的意义 1. 不定式的一般式：一般式表示的动作或状态发生在谓语动词表示的动作或状态的同时或之后。当不定式的逻辑主语是这个不定式所表示的动作的承受者时，不定式一般要用被动式(to be done). eg: He seemed to be tired. The building to be finished next month is for our teachers. 2. 不定式的进行式：进行式表示动作正在进行，与谓语的动作同时发生。 . When I went to his home, he happened to be traveling around the world. 3. 不定式的完成式：如果不定式所表示的动作或状态发生在谓语动词所表示动作或状态之前，就用完成式；若是在此基础上的被动含义，就用完成被动式( to have been done).
. He is said to have written a novel about the Long March. He is said to have been taught French when he was a child. 4. 不定式的完成进行式：如果不定式的动作是在谓语所表示的时间之前一直在进行或有可能继续进行的动作，就要用完成进行式. eg: We’re happy to have been working with the experts all the month. 二、不定式的用法： 1. 不定式做主语：不定式做主语一般表示具体的某次动作。而动名词doing 表示习惯的，经常的动作。 1)不定式作主语时,谓语用单数 To do such things is foolish. 2）主系表结构 To see is to believe. 3)it形式主语。当主语较长，谓语较短时，常用it做形式主语，将不定式放到谓语的后面。 常用于下列结构中： (1)It is/was +adj.+(of sb.) to do…（如 good/ kind/ nice/ clever/ foolish/ selfish…） (2)It is +adj.+(for sb.)+to do…（如easy / difficult / hard / / unwise / possible/ necessary…） (3)It is +a/an +名词+ to do...（如a pity/ a shame / a pleasure /one’s duty / an honor …）