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一、动词语态详解语态是动词的一种形式，它用来表示句中主语同谓语动词之间的关系。
英语有两种语态，主动语态和被动语态，主动语态表示主语是谓语动词动作的执行者，被动语态表示主语是谓语动词动作的承受者。
例如：1.I have repaired the radio.我修好了收音机。
2.The radio has been repaired.收音机被修好了。
3.The students cleaned the classroom.学生们打扫了教室。
4.The classroom was cleaned by the students.教室被学生们打扫了。
被动语态的构成：be + 过去分词1.A building was damaged by the storm.暴风雨毁坏了一座建筑物。
2.Our plate was made in China.我们的盘子是中国生产的。
3.My bike was stolen.我的自行车被盗了。
常用的被动语态的时态变化如下，以 ask 为例：现在I am asked, I am being asked, I have been asked过去I was asked,I was being asked,I had been asked将来I shall be asked, I shall have been asked过去将来I shall be asked被动语态的疑问句是把助动词提前到句首。
1.Has your TV set been repaired?你的电视机修了吗?2.Was the kite broken?风筝破了吗?3.Has the work been done?工作结束了吗?被动语态的否定式是在助动词后面加 not.1.The letter has not been sent out.信还没有发出去。
2.The little boy has not been found out.小孩还没有找到。
四六级真题语法解析四六级真题语法解析常见题型：听力理解、选词填空、信息匹配、阅读多项选择、段落翻译、短文写作常见句型：1. It is true/ obvious/clear/ possible/ certain that…真题解析：①It is simply not true that economic growth will surely make our world cleaner.(16 年6 月CET6,第一套)经济增长一定会使环境改善也绝非事实。
②It is certainly possible that we could get very slow growth over the next year.(16 年6 月CET6,第一套)在下一年里取得缓慢的增长是完全可能的。
③It is clear that consumers don’t always know what they are getting.(16 年6 月CET6,第三套)很明显，对于自己买的产品究竟是何等货色，消费者们并不总是很清楚。
2. It is hard/difficult/important/necessary/possible ( for sb.) to do sth.真题解析：①Therefore,it is advisable for us to distinguish the authenticity of information. (16 年6 月CET6,第一套)因此，对我们来说，学会甄别信息是可取的。
②It is highly important to expand the metropolitan areas. (15 年12 月CET6,第一套)扩大都市圈至关重要。
3. It is reported/learned/estimated that ...真题解析：①It is estimated that step would save hundreds of billions ofdollars over the next decade. (16 年6 月CET6,第二套) 据估计，这一举措将在未来十年节省数千亿美元。
2012年6月1.Those flowers looked as if they hadn’t been watered for quite a longtime.As if 的用法：通常都要用虚拟语气，表示与现在的情况相反；但表示的情况是事实或极有可能是事实是则用陈述句语气。
有关情态动词的语法：情态动词 (Model Verbs) 又称为情态助动词 (Model Auxil-iaries).英语中助动词主要有两类:一是基本助动词,如have, do, be;二是情态助动词,如may, must, need等.情态动词与其他动词连用表示说话人的语气.情态动词可表达建议,要求,可能和意愿等.情态动词没有人称和数的变化.在大学英语四,六级考试中,情态动词部分重点测试以下内容:(1)情态动词+行为动词完成式(2)情态动词+行为动词进行式(3)情态动词+行为动词完成进行式(4)某些情态动词的特殊用法一,情态动词+行为动词完成式情态动词+行为动词完成式即"情态动词+ have + v-ed分词",表示对过去行为或动作进行推测,评论或判断.1. must have v-edmust have v-ed 表示推测过去某事"一定"发生了.其否定形式为:can't / couldn't have v-ed, 表示过去不可能发生某事.例如:1) Since the ditch is full of water, it must have rained last night.2) You couldn't have met my grandmother. She died before you were born.2. could have v-edcould have v-ed 表示推测过去某动作"很可能"发生了.例如:1)"The dictionary has disappeared. Who could have taken it？"2)"Tom could have taken it. He was alone yesterday."3.may / might have v-edmay / might have v-ed 表示推测过去某事"也许"发生了.may 比might 表示的可能性在说话人看来稍大些.例如:I can't find my keys. I may / might have left them at the school yesterday.4. ought to / should have v-ed 和 ought not to / shouldn't have v-edought to / should have v-ed 和 ought not to / shouldn't have v-ed 用于对已发生的情况表示"责备","不满",分别表示"本应该…"和"本不应该…".例如:1) With all the work finished, I should have gone to the party last night.2) You ought not to have made fun of him. He is not the one you laugh at but learn from.5. needn't have v-edneedn't have v-ed 表示过去做了某事,但没有做的必要, 意为"本没必要…".例如:You needn't have waken me up; I don't have to go to work today.注:表示推测过去某动作发生的可能性时,就表示的可能性程度而言,must最大,could其次,may更次之,might最小.例如:"I wonder how Tom knew about your past.""He must / could / may / might have heard of it from Mary." 二,情态动词+行为动词进行式情态动词+行为动词进行式(即情态动词+ be + v-ing形式),表示推测或评论某动作现在是否正在进行.例如:1) He must be playing basketball in the room.2) She may be staying at home.三,情态动词+行为动词完成进行式情态动词+行为动词完成进行式(即情态动词+ have been + v-ing 形式),表示推测或评论过去某动作是否正在进行或一直在进行.例如:1) They should have been meeting to discuss the problem.2) He may / might have been buying stamps in the post office when you saw him.四,某些情态动词的特殊用法1. need考试中主要测试 need 作情态动词与作实义动词的区别,对此,可参见表1.need 作情态动词时,后面跟不带to 的动词不定式,即 "need do".通常用在疑问句和否定句中,表示询问是否有"必要",其否定形式为needn't,表示"不必";疑问形式为Need … do 极少用于肯定句.例如:1) I don't think we need turn the light on at that time.2) Need you ride a bike to the school?真题：2011年6月Jane is tired of dealing with customer complaints and wishes that she______________________.(能被分配做另一项工作)2012年6月It is suggested that the air conditioner ______________.(要安装在窗户旁)should的型虚拟语气，表示主观愿望的词。
大学英语四六级语法测试卷1.---What’s your idea?---My opinion is , happens, we should not stop the reform.A.when; whatB. that; whenC. that; whateverD. when; what2.Martin Smith who, at 22, is one of the male nannies(保姆) admits that it will be some timemale nannies are totally accepted.A.sinceB. untilC. beforeD. after3.Provide your doctor with a detailed medical history he can give you theaccurate treatment.A.even ifB. so thatC. in caseD. as though4.The little girl who got lost decided to stay she was and wait for her mother.A.whatB. howC. whereD. who5.She always comes to our help when we get into trouble she is very busy.A.ever sinceB. onceC. even ifD. so that6.The young couple, who returned my lost wallet, left I could ask their names.A.whileB. beforeC. afterD. since7.I went the South Lake in Hanzhong, I was deeply impressed with its beautiful scenery.A.For the first timeB. The first timeC. At firstD. It was the first time8.Cathy had quit her job when her son was born she could stay home and raise her family.A.now thatB. as ifC. only ifD. so that9.you start eating in a healthier way, weight control will become much easier.A.UnlessB. AlthoughC. BeforeD.Once10.I’ll be out for some time. anything important happens, call me up immediately.A.In caseB. As ifC. Even thoughD. Now that11.I don’t really like the author, I have to admit his books are very exciting.A.althoughB. unlessC.untilD. once12.No one can ignore the fact that his wife is independent her husband earns all or mostof the family income.A.now thatB. in caseC. even ifD. only if13.It is hard for the Greek government to get over the present difficulties gets morefinancial support from the European Union.A.ifB. unlessC. becauseD. since14.They reached the top of the mountain they could see the highway wandering before them.A.whichB. whyC. whoseD. where15.I tried all I could do the topic at the meeting, but failed.A.avoid mentioningB. to avoid mentioningC. avoiding to mentionD. avoiding mentioning16.If you’d like to gain more contents from the website, you have to answer some messagespersonal information.A.r ecognizingB. requestingC. preferringD. expressing17.The building last spring is a hospital for children and women.A.to builtB. to be builtC. builtD. building18.The students went into the classroom, .A.talking and laughingB. talk and laughC. talked and laughedD. to talk and laugh19.When about the possibility that Justin was taken away by aliens, Detective SanPeterson,who has taken charge of the case, didn’t say much.A.askingB. askedC. to askD. ask20.I regret you that my daughter has already regretted out with you. So leaveher alone and don’t bother her any more.A.telling; datingB. to tell; to dateC. to tell; datingD. telling; to date21.The people of the flooded area are reported into newly built buildings, where theyare living better than ever before.A.movingB. to have movedC. to moveD. having moved22.The old woman sat in her favorite chair and with her eyes on the window.A.fixedB. fixingC. to be fixedD. to be fixing23.When I rushed there, there were so many people outside the booking office that Icould figure out that my chances of getting a ticket were slim.A.waitingB. waitedC. to waitD. who wait24.The young man, in heavy traffic on the way, got home an hour later than usual.A.catchingB. caughtC. having caughtD. to be caught25.---Don’t you call Mr. Wang at nine tomorrow？---He to a lecture on the reform of the college entrance examination.A.will listenB. will be listeningC. is listeningD. will have listened26.The singer’s music video nearly 9 million times since it was posted on the Internetfour weeks ago.A.viewedB. was viewedC. has viewedD. has been viewed27.warmly for his work, he was too to fall asleep.A.Praising; excitedB. To praise; excitingC. Praised; excitingD. Praised; excited28.---Look! How long like this?---Three weeks! It’s usual here that rain without stopping these days of the year.A.had it rained; poursB. has it been raining; poursC. is it rained; is pouringD. does it rain; pours29.The young man, who by then admission to Peking University, determined to do some part-time jobs to gain more practical skills.A.gainedB. was gainingC. has gainedD. had gained30.You’ve failed to do what you to and I’ m afraid the teacher will blame you.A.will expectB. expectedC. were expectedD. will be expected（答案）1.解析：正确答案为C。
四六级考试语法四六级考试语法总概述Ⅰ.动名词1. 某些动词后要接动名词某些及物动词后能⽤动名词⽽不能⽤不定式作宾语，其中最常⽤动词的有admit, avoid, appreciate, complete, consider, delay, deny, dislike, enjoy, escape, excuse, fancy, finish, forgive, involve, imagine, can’t help, mind, miss, postpone, practise, prevent, quit, resent, risk, resist, suggest等。
She suggested spending another day in the mountain area.There’s no way to escape doing the work.She is considering asking her employer for a rise.Note:①在need、want、require、deserve等动词后的动名词相当于不定式的被动式The clock needs/wants repairing. (=The clock needs/wants to be repaired)The disabled deserve respecting. (=The disabled deserve to be respected.)②在like、hate、prefer等动词后,如果表⽰⼀般倾向,则⽤动名词作宾语;如果指具体的某次发⽣在将来的⾏动，则要⽤不定式。
I like reading books of this kind, but I do n’t like to read that book.She prefers walking to cycling.I prefer to stay at home today.③在remember、forget、regret等动词后,如果⽤动名词作宾语，则表⽰该宾语的动作发⽣在动词谓语的动作之前;如果⽤不定式作宾语，则表⽰宾语的动作发⽣在动词谓语的动作之后I remembered locking the door. (=I remembered that I had locked the door.)I remembered to lock the door (=I remembered that I was to lock the door.)I regret telling you about it. (=I regret that I told you about it.)I regret to tell you he has fallen ill. (=I regret that I am to tell you he has fallen ill.)2. 动名词作介词的宾语动名词可作介词的宾语，与介词⼀起构成介词短语，在句中作定语、状语或表语。
四六级语法知识点详解英语四六级考试是大学英语水平考试的一种，对于很多学生来说，语法是其中一个比较难以掌握的部分。
本文将详细解释四六级考试中常见的语法知识点，帮助学生更好地应对考试。
一、时态和语态1. Simple Present Tense（简单现在时）简单现在时表示经常或习惯性发生的动作、真理、客观存在的事实等。
结构：主语 + 动词原形（第三人称单数在动词后加s或es）例句：I eat breakfast every morning.（我每天早上吃早餐）2. Present Continuous Tense（现在进行时）现在进行时表示现在正在进行的动作。
结构：主语 + am/is/are + 动词ing形式例句：She is studying in the library now.（她正在图书馆学习）3. Simple Past Tense（简单过去时）简单过去时表示过去某个时间发生的动作或存在的状态。
结构：主语 + 动词过去式例句：They visited their grandparents last weekend.（他们上周末去看望了他们的祖父母）4. Past Continuous Tense（过去进行时）过去进行时表示过去某个时间正在进行的动作。
结构：主语 + was/were + 动词ing形式例句：I was watching TV when she called me.（她打电话给我时，我正在看电视）5. Simple Future Tense（简单将来时）简单将来时表示将来要发生的动作或存在的状态。
结构：主语 + will + 动词原形例句：We will have a party next week.（我们下周要开个派对）6. Future Continuous Tense（将来进行时）将来进行时表示将来某个时间正在进行的动作。
结构：主语 + will be + 动词ing形式例句：I will be sleeping when you arrive.（当你到达时，我将正在睡觉）7. Passive Voice（被动语态）被动语态用于强调动作的承受者而不是施动者。
掌握四六级的常见语法知识英语四六级考试是中国国家级考试中最重要的英语能力测试之一。
在考试中，语法知识是考察的重点之一，掌握常见的语法知识对于取得好成绩至关重要。
本文将介绍一些四六级考试中常见的语法知识点，希望能够帮助大家更好地应对考试。
一、时态1. 一般现在时一般现在时表示经常性的、普遍性的动作或状态。
常用的时间状语有always、usually、often等。
例如：He always goes to bed early.2. 现在进行时现在进行时表示现在正在进行的动作，常与now、at the moment等时间状语连用。
例如：She is reading a book now.3. 一般过去时一般过去时表示过去某个时间发生的动作或状态。
常用的时间状语有yesterday、last week等。
例如：I watched a movie last night.4. 过去进行时过去进行时表示过去某个时间正在进行的动作。
例如：He was studying when I called him.5. 一般将来时一般将来时表示将来某个时间要发生的动作。
常用的时间状语有tomorrow、next week等。
例如：I will visit my grandparents next month.二、被动语态1. 一般现在时的被动语态一般现在时的被动语态结构为be+过去分词。
常用于没有明确表示动作执行者的句子。
例如：The book is written by a famous author.2. 一般过去时的被动语态一般过去时的被动语态结构为was/were+过去分词。
表示过去某个时间发生的被动动作。
例如：The letter was sent yesterday.3. 一般将来时的被动语态一般将来时的被动语态结构为will be+过去分词。
表示将来某个时间会发生的被动动作。
例如：The cake will be eaten at the party.三、虚拟语气1. 虚拟语气的主要用法虚拟语气用于表示非真实的情况、假设、建议等。
He talked about the teachers and schools that he had visited.2）不用that, 只用which的情况a）引导非限定性定语从句时whichThe tree, which is four hundred years old, is very famous here.b）介词后用whichWe depend on the land from which we get our food.3．关系副词引导的定语从句关系副词可代替的先行词是时间、地点或理由的名词，在从句中作状语。
1）先行词是表示地点名词时（country, school, room…），而关系词代替先行词在定语从句中充当地点状语，一般用where引导定语从句。
也可以用介词+which的结构。
值得注意的是which前的介词选择是根据先行词与介词的搭配关系而定。
Beijing is the place in which (=where) I was born.He wants to find the place in which (=where) he lived forty years ago.2）先行词是表示时间名词时（year, month, day, night…），而关系词代替先行词在定语从句中充当时间状语，一般用when引导定语从句。
也可以用介词+which的结构。
值得注意的是when前的介词选择是根据先行词与介词的搭配关系而定。
His father died that year in which (=when) he was born.I cannot forget the first day on which (=when) my family moved into the city.3) 先行词是the reason，而关系词代替先行词在定语从句中充当原因状语，一般用why 引导定语从句。
四六级语法题常考知识点在四六级考试中，语法题是其中的重要组成部分。
合理地掌握并熟悉常考的语法知识点，对于正确解答语法题具有重要的帮助作用。
本文将介绍四六级语法题常考的知识点，帮助考生更好地备战考试。
一、冠词的用法冠词是常考的语法知识点之一。
在英语中，冠词分为不定冠词（a/an）和定冠词（the）。
使用冠词需要根据具体情况来决定。
1. 不定冠词的用法：- 当第一次提及的时候，用不定冠词a/an。
例如：I saw a dog in the park.- 当泛指某类事物时，用不定冠词a。
例如：A dog is a loyal animal.- 当表达数量为一的情况时，用不定冠词a/an。
例如：I want to buya book.2. 定冠词的用法：- 当第一次提及的时候，用定冠词the。
例如：The dog I saw yesterday was very cute.- 当特指某个事物时，用定冠词the。
例如：The book on the table is mine.- 当上下文已经明确指代某个事物时，用定冠词the。
例如：I saw a dog. The dog was barking loudly.二、时态的运用时态是四六级语法题中经常涉及的内容。
正确的时态使用能够更准确地表达动作的发生时间和持续状态。
1. 一般现在时：- 表示经常性、习惯性的动作。
例如：I often go to the gym.- 表示客观真理。
例如：The sun rises in the east.- 表示现阶段的情况。
例如：I live in Beijing.2. 一般过去时：- 表达过去某个时间发生的动作。
例如：I watched a movie last night.- 表达过去的习惯性动作。
例如：He always played basketball when he was young.3. 一般将来时：- 表示将来要发生的动作。
四六级真题语法解析常见题型：听力理解、选词填空、信息匹配、阅读多项选择、段落翻译、短文写作常见句型：1. It is true/ obvious/clear/ possible/ certain that…真题解析：①It is simply not true that economic growth will surely make our world cleaner.(16 年6 月CET6,第一套)经济增长一定会使环境改善也绝非事实。
②It is certainly possible that we could get very slow growth over the next year.(16 年6 月CET6,第一套)在下一年里取得缓慢的增长是完全可能的。
③It is clear that consumers don’t always know what they are getting.(16 年6 月CET6,第三套)很明显，对于自己买的产品究竟是何等货色，消费者们并不总是很清楚。
2. It is hard/difficult/important/necessary/possible ( for sb.) to do sth.真题解析：①Therefore,it is advisable for us to distinguish the authenticity of information. (16 年6 月CET6,第一套)因此，对我们来说，学会甄别信息是可取的。
②It is highly important to expand the metropolitan areas. (15 年12 月CET6,第一套)扩大都市圈至关重要。
3. It is reported/learned/estimated that ...真题解析：①It is estimated that step would save hundreds of billions of dollars over the next decade. (16 年6 月CET6,第二套)据估计，这一举措将在未来十年节省数千亿美元。
4. It looks as if/as though…真题解析：①It looks as though self-control is something that in one generation can disadvantage the next generation. (16 年6 月CET6,第二套)这样看来，上一代的自制力似乎会影响到下一代。
5. It is + 被强调部分+ that ...真题解析：①It was this lack of information that prompted the launch of I’m First in 2013. (15 年12 月CET6,第一套)正是由于信息缺乏，促使“我是第一代”机构于2013 年成立。
②It was only in the 20th century that Leonardo’s portrait of his patron’s wife rocketed to the number-one spot.(15 年6 月CET6,第一套)直到20 世纪，莱昂纳多为其赞助人的妻子画的画像才飙升至首要位置。
③It’s when you find yourself surrounded by toxic friends who live in the past that you realize you’re not getting any younger. (15 年6 月CET6,第一套)当你发现你的朋友都沉迷在过去的时候，你会意识到自己不再年轻。
④It was his curiosity that made him invent so many things and achieved great success in his career. (15 年6 月CET6,第二套)正是他的好奇心驱使他发明了如此多的东西，从而最终在事业上取得了巨大的成功。
⑤It is due to his focus on small things that Apple makes great success in the mobile field. (15 年6 月CET6,第三套)正是由于他专注于做小事情，苹果公司才在手机行业取得了巨大的成功。
6. It takes（sb.）... to do sth.真题解析：①It will take a long time to change the current trend in higher education. (15年12 月CET6,第二套)改变高等教育的现状需要很长时间。
7.It is not until + 被强调部分+ that ...真题解析：①It wasn’t until I hit around 25 that I realized I’d missed a large chunk of my life for absolutely no reason. (15 年6 月CET6,第二套)直到我25 岁我才意识到我毫无缘由地错过了生活中的大把时光。
（二）名词性从句常见题型：听力理解、选词填空、信息匹配、阅读多项选择、短文写作、段落翻译常见句型：1.主语从句真题解析：①But what most students and parents don’t realize is that schools have hidden motives for offering early decision. (15 年5 月CET6,第二套)但是，大多数学生和家长并没有意识到，学校之所以提前录取是有其隐藏动机的。
2.宾语从句真题解析：①Piaget argued that attaining and accepting a vocation is one of the best ways to modify idealized views and to mature.(16 年6 月CET6,第一套)皮亚杰认为获得并接受一份职业是修正理想化观念和使人变成熟的最好途径之一。
②…all the facts suggest that high unemployment in America is the result of inadequate demand.（16 年6 月CET6,第一套）所有的事实都表明美国的高失业率是需求不足的结果。
③The study found that even in high-poverty schools,teachers consistently had a huge positive or negative impact. （16 年6 月CET6,第三套）研究发现，即便在极度贫困的学校，教师也始终起到了巨大的积极或消极的影响。
④On the contrary, other people claim that it is a common phenomenon that a host of youngsters spend so much time reading on social networks. （15 年12 月CET6,第一套）而相反，另一些人却认为现在的年轻人花费太多的时间浏览社交网络。
⑤From the standpoint of a traditional educator, this outcome indicated that schooling had failed to help students think about major scientific ideas. （15 年12 月CET6,第三套）从传统教育工作者的角度来看，这一结果表明，学校教育未能帮助学生思考重要科学理念。
⑥He points out that the most reproduced works of impressionism today tend to have been bought by five or six wealthy and influential collectors in the late 19th century. （15 年6 月CET6,第一套）他指出，当今转载最多的印象派作品大多在19 世纪末被五六个富裕并有影响力的收藏家购买过。
3.表语从句真题解析：①And that, fundamentally, is why claims that we face huge structural problems have been multiplying. (16 年6 月CET6,第一套)这也就从根本上解释了为什么我们面临巨大的结构性问题的论调被多次复制。
②Chances are that the product is made in China.(15 年12 月CET6,第二套)很有可能这件产品是中国制造的。
③…this sort of activity is where the future of environmental action lies. (15年12 月CET6,第三套)这种活动正是环境行动的未来所在。
④The lesson taught by plants is that sharing life expands and enhances the sphere of the living. (15 年6 月CET6,第一套)植物教给我们的是分享生活，拓展生命空间，提升生命层次。
⑤The problem is that this process effectively shortens the window of time students have to make one of the most important decisions of their lives up to that point. (15 年6 月CET6,第二套)问题在于这个过程有效地将学生必须做出人生重大决策之一的一小段时间缩短到那一刻。
4.同位语从句真题解析：① But missing from all these data is the sense that today’s young care very much about their country, about political environment, or about the future of their society. (16 年6 月CET6,第三套)但在这所有这些数据中，都没有信息表明当今年轻人关心自己的国家，关心政治环境，或者关心社会的未来。
