w88优德-无论是写作仍是日子

北大再难考,他也相信自己多熬两年肯定能考上。前段时间,一位本科毕业生经他介绍到大队面试,直说自己的目的是为了学习和考研,保安公司最后没要他。到时请乘坐上述线路出行的乘客提早组织好出行时刻和路途。

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w88优德-无论是写作仍是日子

【www.nfengine.com - 造句】

  情态动词不能表示正在发生或已经发生的事情,只表示期待或估计某事的发生。大家不妨来看看小编推送的w88优德-无论是写作仍是日子,希望给大家带来帮助!

  1.You may come anytime you want.

  Student may not sleep in class

  2.I would go to Norway one day.

  I would not choose this color.

  3.You should respect your teacher.

  You should not make noise when the baby is sleeping.

  4.I can speak 3 languages.

  I can not finish it in 1 hour.

  5.You must finish your homework before playing with the dog.

  You must not eat it up if you are full.

  情态动词及其用法

  1) 情态动词不能表示正在发生或已经发生的事情,只表示期待或估计某事的发生。

  2) 情态动词 除ought 和have 外,后面只能接不带to 的不定式。

  3) 情态动词没有人称,数的变化,即情态动词第三人称单数不加-s。

  4) 情态动词没有非谓语形式,即没有不定式,分词,等形式。

  比较can 和be able to

  1)can could 表示能力;可能 (过去时用could),

  只用于现在式和过去式(could)。be able to可以用于各种时态。

  They will be able to tell you the news soon. 他很快就能告诉你消息了。

  2)只用be able to

  a. 位于助动词后。

  b. 情态动词后。

  c. 表示过去某时刻动作时。

  d. 用于句首表示条件。

  e. 表示成功地做了某事时,只能用was/were able to, 不能用could。

  He was able to flee Europe before the war broke out.

  = He managed to flee Europe before the war broke out.

  注意:could不表示时态

  1)提出委婉的请求,(注意在回答中不可用could)。

  --- Could I have the television on?

  --- Yes, you can. / No, you can't.

  2)在否定,疑问句中表示推测或怀疑。

  He couldn't be a bad man.

  他不大可能是坏人。

  比较may和might

  1) 表示允许或请求;表示没有把握的推测;may 放在句首,表示祝愿。

  May God bless you!

  He might be at home.

  注意: might 表示推测时,不表示时态。只是可能性比may 小。

  2) 成语: may/might as well,后面接不带to 的不定式,意为"不妨"。

  If that is the case, we may as well try.

  典型例题

  Peter ___come with us tonight, but he isn't very sure yet.

  A. must  B. may  C. can  D. will

  答案B. 表可能性只能用may. 此句意可从后半句推出。

  比较have to和must

  1) 两词都是'必须'的意思,have to 表示客观的需要, must 表示说话人主观上的看法,既主观上的必要。

  My brother was very ill, so I had to call the doctor in the middle of the night. 我弟弟病得很厉害,我只得半夜里把医生请来。(客观上需要做这件事)

  He said that they must work hard. 他说他们必须努力工作。(主观上要做这件事)

  2) have to有人称、数、时态的变化,而must只有一种形式。但must 可用于间接引语中表示过去的必要或义务。

  He had to look after his sister yesterday.

  3) 在否定结构中: don't have to  表示"不必"

  mustn't    表示"禁止",

  You don't have to tell him about it.  你不一定要把此事告诉他。

  You mustn't tell him about it.    你一定不要把这件事告诉他。

  must表示推测

  1) must用在肯定句中表示较有把握的推测,意为"一定"。

  2) must表对现在的状态或现在正发生的事情的推测时, must 后面通常接系动词be 的原形或行为动词的进行式。

  You have worked hard all day.You must be tired.  你辛苦干一整天,一定累了。(对现在情况的推测判断)

  He must be working in his office. 他一定在办公室工作呢。

  比较:

  He must be staying there.

  他现在肯定呆在那里。

  He must stay there.

  他必须呆在那。

  3) must 表示对已发生的事情的推测时,must 要接完成式。

  I didn't hear the phone. I must have been asleep. 我刚才没有听到电话,我想必是睡着了。

  4) must表示对过去某时正发生的事情的推测,must 后面要接不定式的完成进行式。

  ---Why didn't you answer my phone call?

  ---Well, I must have been sleeping, so I didn't hear it.

  5) 否定推测用can't。

  If Tom didn't leave here until five o'clock, he can't be home yet. 如果汤姆五点才离开这儿,他此时一定还未到家。

  表示推测的用法

  can, could, may, might, must 皆可表示推测,其用法如下:

  1)情态动词+动词原形。

  表示对现在或将来的情况的推测,此时动词通常为系动词。

  I don't know where she is, she may be in Wuhan.

  2)情态动词+动词现在进行时。

  表示对现在或将来正在进行的情况进行推测。

  At this moment, our teacher must be correcting our exam papers.

  这时,我们老师想必在批改试卷。

  3)情态动词+动词完成时。

  表示对过去情况的推测。

  We would have finished this work by the end of next December.

  明年十二月底前我们很可能已完成这项工作了。

  The road is wet. It must have rained last night.

  地是湿的,昨天晚上一定下雨了。

  4)情态动词+动词的现在完成进行时。

  表示对过去正在发生事情的推测。

  Your mother must have been looking for you.

  你妈妈一定一直在找你。

  5)推测的否定形式,疑问形式用can't, couldn't表示。

  Mike can't have found his car, for he came to work by bus this morning.

  迈克一定还没有找回他的车,因为早上他是坐公共汽车来上班的。

  注意:could, might表示推测时不表示时态,其推测的程度不如can, may。

  情态动词+ have +过去分词

  1) may(might) have + done sth, can (could) have + done sth 表示过去,推测过去时间里可能发生的事情。

  Philip may (might) have been hurt seriously in the car accident.

  Philip can (could) have been hurt seriously in the car accident.

  2) must have +done sth,对过去时间里可能发生的事情的推测,语气较强,具有"肯定","谅必"的意思。

  ---Linda has gone to work, but her bicycle is still here.

  ---She must have gone by bus.

  3) ought to have done sth, should have done sth

  本应该做某事,而事实上并没有做。否定句表示"不该做某事而做了"。

  You ought to (should) have been more careful in this experiment.

  He ought not to have thrown the old clothes away.(事实上已扔了。)

  ought to 在语气上比should 要强。

  4) needn't have done sth  本没必要做某事

  I dressed very warmly for the trip, but I needn't have done so. The weather was hot.

  5) would like to have done sth  本打算做某事

  I would like to have read the article, but I was very busy then.

  三十五个经典句型 帮你过写作关(英语四级)

  一、~~~ the + ~ est + 名词 + (that) + 主词 + have ever + seen ( known/heard/had/read, etc)

  ~~~ the most + 形容词 + 名词 + (that) + 主词 + have ever + seen ( known/heard/had/read, etc)

  例句:Helen is the most beautiful girl that I have ever seen.

  海伦是我所看过最美丽的女孩。

  Mr. Chang is the kindest teacher that I have ever had.

  张老师是我曾经遇到最仁慈的教师。

  二、Nothing is + ~~~ er than to + V

  Nothing is + more + 形容词 + than to + V

  例句:Nothing is more important than to receive education.

  没有比接受w88优德 更重要的事。

  三、~~~ cannot emphasize the importance of ~~~ too much.

  (再怎么强调...的重要性也不为过。)

  例句:We cannot emphasize the importance of protecting our eyes too much.

  我们再怎么强调保护眼睛的重要性也不为过。

  四、There is no denying that + S + V ...(不可否认的...)

  例句:There is no denying that the qualities of our living have gone from bad to worse.

  不可否认的,我们的生活品质已经每况愈下。

  五、It is universally acknowledged that + 句子~~ (全世界都知道...)

  例句:It is universally acknowledged that trees are indispensable to us.

  全世界都知道树木对我们是不可或缺的。

  六、There is no doubt that + 句子~~ (毫无疑问的...)

  例句:There is no doubt that our educational system leaves something to be desired.

  毫无疑问的我们的w88优德 制度令人不满意。

  七、An advantage of ~~~ is that + 句子 (...的优点是...)

  例句:An advantage of using the solar energy is that it won‘t create (produce) any pollution.

  使用太阳能的优点是它不会制造任何污染。

  八、The reason why + 句子 ~~~ is that + 句子 (...的原因是...)

  例句:The reason why we have to grow trees is that they can provide us with fresh air.

  The reason why we have to grow trees is that they can supply fresh air for us.

  我们必须种树的原因是它们能供应我们新鲜的空气。

  九、So + 形容词 + be + 主词 + that + 句子 (如此...以致于...)

  例句:So precious is time that we can‘t afford to waste it.

  时间是如此珍贵,我们经不起浪费它。

  十、Adj + as + Subject(主词)+ be, S + V~~~ (虽然...)

  例句:Rich as our country is, the qualities of our living are by no means satisfactory.

  {by no means = in no way = on no account 一点也不}

  虽然我们的国家富有,我们的生活品质绝对令人不满意。

  十一、The + ~er + S + V, ~~~ the + ~er + S + V ~~~

  The + more + Adj + S + V, ~~~ the + more + Adj + S + V ~~~(愈...愈...)

  例句:The harder you work, the more progress you make.

  你愈努力,你愈进步。

  The more books we read, the more learned we become.

  我们书读愈多,我们愈有学问。

  十二、By +Ving, ~~ can ~~ (借着...,..能够..)

  例句:By taking exercise, we can always stay healthy.

  借着做运动,我们能够始终保持健康。

  十三、~~~ enable + Object(受词)+ to + V (..使..能够..)

  例句:Listening to music enable us to feel relaxed.

  听音乐使我们能够感觉轻松。

  十四、On no account can we + V ~~~ (我们绝对不能...)

  例句:On no account can we ignore the value of knowledge.

  我们绝对不能忽略知识的价值。

  十五、It is time + S + 过去式 (该是...的时候了)

  例句:It is time the authorities concerned took proper steps to solve the traffic problems.

  该是有关当局采取适当的措施来解决交通问题的时候了。

  十六、Those who ~~~ (...的人...)

  例句:Those who violate traffic regulations should be punished.

  违反交通规定的人应该受处罚。

  十七、There is no one but ~~~ (没有人不...)

  例句:There is no one but longs to go to college.

  没有人不渴望上大学。

  十八、be + forced/compelled/obliged + to + V (不得不...)

  例句:Since the examination is around the corner, I am compelled to give up doing sports.

  既然考试迫在眉睫,我不得不放弃做运动。

  十九、It is conceivable that + 句子 (可想而知的)

  It is obvious that + 句子 (明显的)

  It is apparent that + 句子 (显然的)

  例句:It is conceivable that knowledge plays an important role in our life.

  可想而知,知识在我们的一生中扮演一个重要的角色。

  二十、That is the reason why ~~~ (那就是...的原因)

  例句:Summer is sultry. That is the reason why I don‘t like it.

  夏天很燠热。那就是我不喜欢它的原因。

  二十一、For the past + 时间,S + 现在完成式...(过去...年来,...一直...)

  例句:For the past two years, I have been busy preparing for the examination.

  过去两年来,我一直忙着准备考试。

  二十二、Since + S + 过去式,S + 现在完成式。

  例句:Since he went to senior high school, he has worked very hard.

  自从他上高中,他一直很用功。

  二十三、It pays to + V ~~~ (...是值得的。)

  例句:It pays to help others.

  帮助别人是值得的。

  二十四、be based on (以...为基础)

  例句:The progress of thee society is based on harmony.

  社会的进步是以和谐为基础的。

  二十五、Spare no effort to + V (不遗余力的)

  We should spare no effort to beautify our environment.

  我们应该不遗余力的美化我们的环境。

  二十六、bring home to + 人 + 事 (让...明白...事)

  例句:We should bring home to people the value of working hard.

  我们应该让人们明白努力的价值。

  二十七、be closely related to ~~ (与...息息相关)

  例句:Taking exercise is closely related to health.

  做运动与健康息息相关。

  二十八、Get into the habit of + Ving

  = make it a rule to + V (养成...的习惯)

  We should get into the habit of keeping good hours.

  我们应该养成早睡早起的习惯。

  二十九、Due to/Owing to/Thanks to + N/Ving, ~~~ (因为...)

  例句:Thanks to his encouragement, I finally realized my dream.

  因为他的鼓励,我终于实现我的梦想。

  三十、What a + Adj + N + S + V!= How + Adj + a + N + V!(多么...!)

  例句:What an important thing it is to keep our promise!

  How important a thing it is to keep our promise!

  遵守诺言是多么重要的事!

  三十一、Leave much to be desired (令人不满意)

  例句:The condition of our traffic leaves much to be desired.

  我们的交通状况令人不满意。

  三十二、Have a great influence on ~~~ (对...有很大的影响)

  例句:Smoking has a great influence on our health.

  抽烟对我们的健康有很大的影响。

  三十三、do good to (对...有益),do harm to (对...有害)

  例句:Reading does good to our mind.读书对心灵有益。

  Overwork does harm to health.工作过度对健康有害。

  三十四、Pose a great threat to ~~ (对...造成一大威胁)

  例句:Pollution poses a great threat to our existence.

  污染对我们的生存造成一大威胁。

  三十五、do one‘s utmost to + V = do one‘s best (尽全力去...)

  例句:We should do our utmost to achieve our goal in life.

  我们应尽全力去达成我们的人生目标。

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