Can和could地用法和区别

1、实用文档Can和could的用法和区别表示能力：能，能够，会He could swim when he was 巾veftfc 五岁时就会游泳了。Can you drive a car 你会开车吗？Yes, I can 我会。No, I can我乔会。表示推测：可能，会I think the work can be completed ahead of tim或认为这项工作能提前完成。What can he mean他会是什么意思？注：表示推测时，could不是过去式，只是语气更委婉；若是推测已发生的事或过去的情况，用can/could have加过去分词。如:Today is Sunday.

2、 He cant/couldnchool.Mike can thave found his car, for he came to work by bus this morning.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。表示“有时也会”It can be quite windy there, especially in spring里有时容易舌U风 ,特另在春季。表示允许：可以（口语中常代替may）You can first lend me one book this time次你可以先借给我一本书。You can t take the book out of the roo

3、m你不可以将这本书拿出室外。注意：.表示允许别人做某事只能用can,不能用could。文案大全实用文档. can 和mustn L样，都可表示“不准，不允许”。表示请求：可以Can I go swimming today, please, mum?妈，我今天可以去游泳吗？Could you tell me how I can get to the railway station?告诉我去火车站怎么走吗？注意：could不是过去式，只是语气较can更委婉，注意在回答中不可用 could。如：- Could I have the television on我可以开电视看吗？Yes, you can

4、. / No, you can 可以。/不可以。 can与be able to的比较(1) be able to比can有更多的时态。如：farther andIn the past 50 years or so, scientists have been able too “ seethe sky.在过去50年里，科学家们已经能够往天空看得更远。(2)在表示过去具体某次能够成功做成某事时，只能用 was/were able to如：He worked very hard and was able to pass that examinat 删吟 习非常努力他以能够通过了那场考试。一、情态动词

5、can的用法.表示能力，意思是：能，会。如：I cant swim.我不会游泳。Can you drive 你会开车吗？.表示客观可能性，意思是：可以，可能。如：That big cinema can seats 2,000 peop哪家大电影院能坐 2000人。文案大全实用文档He can be very friendly at times 有时他会很友好。.表示允许（和may意思相近），意思是：可以，能够。如：You can have the book when I have finished i佛我看完了可以给你。Can I use your pen 我可以用你的钢笔吗？.表示惊异、不相

6、信等（用于疑问旬、否定旬或感叹句中），意思是：会，可能。如：This cant be true.这不可能是真的。Can it be true 这可能是真的吗？二、情态动词could的用法.表示“能力”或“可能性”，作为 can的过去形式。如：Could you speak English then 那时你能讲英语吗？He said he couldnt follow me.他说他跟不上我。.表示惊异、怀疑、不相信等情绪。如：Who could have taken them 谁会把它们拿走了呢？She couldnt have left so soon她不可能这么快就走了。在这种情况下，cou

7、ld和can是可以换用的，用could时口气较缓和，用can时不相信的程度更强一些，两者在时间上没有差别。.比较委婉客气地提出问题或陈述看法。如：?/P Could you let me have your passport? Yes, here it is.一看看你的护照好吗？文案大全实用文档一行，这就是。I could come earlier, if necessary. 口果必要我可以早点来。这时could和can没有时间上的差别。4.在虚拟条件句中构成谓语。如：I would certainly do it for you if I could.要是我能做得到，我一定会为你们做这事

8、儿。How I wish I could go with you!我多么希望和你们一道去！三、can, coulcO be able to的区别与联系。1. can的过去式是could, 1 could除了可作can的过去式外，还可表比can更委 婉的语气，因此在回答由could表示请求的问句中，不能用 could,但可用carlo 如： Could you lend me a hand? Of course I can.在表示现在或过去的智力、体力、技能等方面的“能力”时， can, could常可 与be able to互换。如：?/PHe could (or was able to) s

9、wim five miles when he was a boy. be able toW比 can更多的形式，如will be able to, have (has) been able to had been able to等等。因此be able to常被用来表示can所不能表示的将来或完成的 概念。如：?/P文案大全实用文档They will be able to run this machine on their own in three month他们过三个月就能自己开这台机器了。.在表示成功地做了某事时，不用 could,而用 was / were able to或 manage

10、d to, succeeded in doing sth)表示。如：He was able to (or managed to) finish the job yesterday但是 couldnt 和 wasnt / werent able to 常可互换。如：I couldnt / wasnt able to finish the job yesterday.与感觉动词连用时，can, could亦可与be able to互换。如：We could/were able to smell something burning in the kitchen.文案大全实用文档will与would的

11、用法表示意志或意愿：决心，愿意，好吗？We will do our best to save the child我们会尽力抢救这个孩子。I told her to stop crying, but she just wouldn t listen.我叫她别哭，可她就是不愿听。注：表示请求、建议或征求对方意见时，用 Would you？比用Will you？I婉转。如：W川/Would you please keep the door opern?让门开着好吗？W川/Would you go with me?尔愿意和我一起去吗？表示真理或习惯：惯于，总是Oil will float on wat

12、er.没总是浮在水面上。She will listen to music alone in her room for hour她独自在房间里听音乐，一听往往就是几小时。He would get up early when he lived in the country 住在乡下时总是早起。表示要求：一定，必须You will report to me afterward.你稍后一定要向我报告。表示猜测：可能，大概This will be the house you re looking for.这大概就是你找的那所房子了。I think he would accept the invitati

13、on.我想他会接受邀请的。表示功能：能This auditorium will/would seat one thousand people这个礼堂能容纳一千人。 would like表示愿意I would like to have a word with you.我想同你说句话。文案大全实用文档Would you like a cup of tea?青你喝杯茶好吗？would rather。than宁愿也不愿I would rather fail than cheat in the examination.我宁愿考不及格，也不愿意考试作弊。would与used to的比较(1)两者都可以表示

14、过去经常做某事，常可互换。如：When I was young I used to/would get up early我年青时经常早起。下列三种情况要用used to,不用would:强调与现在的对比时；在故事开头时；与 be, stay, belong, live, like , think, kno簿状态动词连用时。如：He doesn t work hard as he used to他不像以前那样努力了。We used to swim every day when we were children. We would run down to the lake andjump in我们

15、小时候天天游泳。我们会跑到湖边，跳进水里They used to live here, didin t they?他们以前住在这里，是不是？(3)与时间段或与表示 “有时”意义的 sometimes, at times, now and then, from time totime等连用时，宜用 would o如：He would sit like that for hours.他会像那样一坐就是几个钟。Sometimes the boys would play a trick on the teachet 时孩子们会戏弄老师。文案大全实用文档has have had当主语是(I, we, t

16、he时用have当主语是第三人称he, she, it时用hashad是has和have的过去式.用法：1、后接过去分词，构成现在和过去完成、完成进行时.例如：He has gone to Beijing他已经到北京去了 .I have been a teacher since then.那时起我就直当教师 .They had left when I got there我到那里的时候 他们已经走了 .He has been working hard since early morning.一大早他就一直在下劲干活 .2、has have ha也可以作为一般动词，意为“拥有”“进行”“吃”“使得

17、” “让”等.如果后接不定式，意为“不得不”.因为它们不是特殊动词，所以不能在它们后面加not构成否定句，不能把它们移到句首构成疑问句.例如：He has a good pen他有支好笔.We have supper at 6:0映们六点钟吃晚饭.I had my hair cut yesterday昨大理了发.(我让我的头发被剪了，昨天)I have to leave now.我得走了 .文案大全实用文档of与for的用法以及区别for表原因、目的of表从属关系介词of的用法(1)所有关系this is a picture of a classroom(2)部分关系a piece of pa

18、pera cup of teaa glass of watera bottle of milkwhat kind of football, american of soccer(3)描写关系a man of thirty 三十岁的人a man of shangha 止海人(4)承受动作the exploitation of man by man 人对人的录哨I。(5)同位关系it was a cold spring morning in the city of london in england(6)关于，对于what do you think of chinese food你觉得中国食品怎么

19、样？介词for的用法小结文案大全实用文档.表示“当作、作为。如:i like some bread and milk for breakfas我喜欢把面包和牛奶作为早餐。what will we have for supper纸们晚餐吃什么？.表示理由或原因，意为“因为、由于。如：thank you for helping me with my english 谢谢你帮我学习英语。thank you for your last letter.谢谢你上次的来信。thank you for teaching us so well感谢你如此尽心地教我们。.表示动作的对象或接受者，意为“给”、”对（而

20、言）如：let me pick it up for you.让我为你捡起来。watching tv too much is bad for your health看电视太多有害于你的健康。.表示时间、距离，意为“计、达”。如：i usually do the running for an hour in the morning我早晨通常跑步一小时。we will stay there for two days我们将在那里逗留两天。.表示去向、目的，意为“向、往、取、买”等。如：let s go for a walk.们出去散步吧。i came here for my schoolba 献来这儿

21、取书包。i paid twenty yuan for the dictionary.我花了 20 元买这本词典。.表示所属关系或用途，意为“为、适于的”。如：it s time for sool.到上学的时间了。文案大全实用文档here is a letter for you.这儿有你的封信。.表示“支持、赞成。如:are you for this plan or against it粉是支持还是反对这个计划 ？.用于一些固定搭配中。如：who are you waiting for?你在等谁?for example, mr green is a kind teache比如，格林先生是一位心地

22、善良的老师。文案大全实用文档一.in,on在方位名词前的区别in 表示 A 地在 B 地范围之内。如： Taiwan is in the southeast of China.on 表示 A 地与 B 地接壤、毗邻。如： North Korea is on the east of China.表示方位的名词east东),west(H), south(W), north(北)等前面都能用表示方位的介 词in, on和to,那么这三个介词的用法：”in the+方位名词”指的是小范围在一个大范围的里面，表示“在某范围之内”，强 调两者的包含关系。如:Beijing is in the north

23、of China.北京在中国的北部。on the+方位名词”指的是一个范围紧挨着另一个范围，表示“两地接壤，强调两 者为相邻关系。如:Korea is on the northeast of China朝鲜在中国的东北面。to the+方位名词”指的是一个范围和另一个范围之间隔段距离 ，表示“在某范 围之外，强调两者是远离关系。如:Japan is to the east of China日本位于中国的东 边。二.at, in, on在表示时间上的区别at指时间表示：(1)时间的一点、时刻等。如：They came home at sunrise ( at noon, at midnight,

24、 at ten o clock, at daybreak,at dawn)(2)较短暂的一段时间。可指某个节日或被认为是一年中标志大事的日子。如：He went home at Christmas (at New Year, at the Spring Festival, at ni。ht.in指时间表示：(1)在某个较长的时间(如世纪、朝代、年、月、季节以及泛指的上午、下午文案大全实用文档或傍晚等)内。如： in 2004, in March, in spring, in the morning, in the evening, etc(2)在一段时间之后。一般情况下，用于将来时，谓语动词为

25、瞬间动词，意为“在以后“。如： He will arrive in two hours.谓语动词为延续性动词时，in意为“在以内”。如：These products will beproduced in a month.注意：after用于将来时间也指一段时间之后，但其后的时间是“一点”，而不是“一段”。如：He will arrive after two o clock.on指时间表示：(1)具体的时日和一个特定的时间，如某日、某节日、星期几等。如：On Christmas Day (On May 4th) , there will be a celebration.(2)在某个特定的早晨、

26、下午或晚上。如： He arrived at10 o clock on the night of the 5th.(3)准时,按时。如：If the train should be on time, I should reach home before dark.三.at, in和on表示地点时的区别at表示地点：(1)用于指较小的地方。如：I shall wait for you at the station.(2)用于门牌号码前。如： He lives at 115 Zhongshan Road.in表示地点:(1)用于指较大的地方。如： He lives in Shanghai.(2)虽

27、然是很小的地方，如果说话人住在那里，也可用 in。商店、学校、机关等，若看作一个地点(point)用at,若看作一个场所(placR文案大全实用文档用 in。如： I met him at the post-office.I m now working in the posOffice.on表示地点，一般指与面或线接触，意为“在上；在旁”。如：The picture was hanging on the wall. New York is on the Hudson River.With是个介词，基本的意思是“用”，但它也可以协助构成一个极为多采多姿的句型，在句子中起两种作用；副词与形容词。w

28、ith在下列结构中起副词作用：“with+宾语见在分词或短语”，如：This article deals with common social ills, with particular attention being paid to vandalism.with+宾语+过去分词或短语”，如：With different techniques used, different results can be obtained.The TV mechanic entered the factory with tools carried in both hands.“with+宾+B容词或短语”，如：With so much water vapour present in the room, some iron-made utensils have become rusty easily.Every night, Helen sleeps with all the windows open.“with+宾语+介词短语”，如：With the school badge on his s