初中二年级英语语法

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初中二年级英语语法

初中二年级英语语法 ‎1) leave的用法 ‎  1."leave+地点"表示"离开某地"。例如:‎ ‎  When did you leave Shanghai?‎ ‎  你什么时候离开上海的? ‎ ‎  2."leave for+地点"表示"动身去某地"。例如:‎ ‎  Next Friday, Alice is leaving for London.‎ ‎  下周五,爱丽斯要去伦敦了。‎ ‎  3."leave+地点+for+地点"表示"离开某地去某地"。例如:‎ ‎  Why are you leaving Shanghai for Beijing?‎ ‎  你为什么要离开上海去北京?‎ ‎2) 情态动词should"应该"学 会 使用 ‎  should作为情态动词用,常常表示意外、惊奇、不能理解等,有"竟会"的意思,例如:‎ ‎  How should I know? 我怎么知道?‎ ‎  Why should you be so late today? 你今天为什么来得这么晚?‎ ‎  should有时表示应当做或发生的事,例如:‎ ‎  We should help each other.我们应当互相帮助。‎ ‎  我们在使用时要注意以下几点:‎ ‎  1.用于表示"应该"或"不应该"的概念。此时常指长辈教导或责备晚辈。‎ ‎  例如:‎ ‎  You should be here with clean hands. 你应该把手洗干净了再来。‎ ‎  2.用于提出意见劝导别人。例如:‎ ‎  You should go to the doctor if you feel ill.‎ ‎  如果你感觉不舒服,你最好去看医生。‎ ‎  3.用于表示可能性。should的这一用法是考试中常常出现的考点之一。例如:‎ ‎  We should arrive by supper tim e. 我们在晚饭前就能到了。‎ ‎  She should be here any moment . 她随时都可能来。‎ ‎3) What...? 与 Which...?‎ ‎  1. what 与 which 都是疑问代词,都可以指人或事物,但是what仅用来询问 ‎  职业。如:‎ ‎  What is your father? 你父亲是干什么的?‎ ‎  该句相当于:‎ ‎  What does your father do?‎ ‎  What is your father's job?‎ ‎  Which 指代的是特定范围内的某一个人。如:‎ ‎  ---Which is Peter? 哪个是皮特?‎ ‎  ---The boy behind Mary. 玛丽背后的那个男孩。‎ ‎  2. What...? 是泛指,所指的事物没有范围的限制;而 Which...? 是特指,‎ ‎  所指的事物有范围的限制。如:‎ ‎  What color do you like best?(所有颜色)你最喜爱什么颜色?‎ ‎  Which color do you like best, blue, green or yellow?‎ ‎  你最喜爱哪一种颜色? (有特定的范围)‎ ‎  3. what 与 which 后都可以接单、复数名词和不可数名词。如:‎ ‎  Which pictures are from China?  哪些图片来自中国?‎ ‎4) 频度副词的位置 ‎  1.常见的频度副词有以下这些:‎ ‎  always(总是,一直)‎ ‎  usually(通常)‎ ‎  often(常常,经常) ‎ ‎  sometimes(有时候)‎ ‎  never(从不)‎ ‎  2.频度副词的位置:‎ ‎  a.放在连系动词、助动词或情态动词后面。如:‎ ‎  David is often arrives late for school.大卫上学经常迟到。‎ ‎  b.放在行为动词前。如:‎ ‎  We usually go to school at 7:10 every day.‎ ‎  我们每天经常在7:10去上学。‎ ‎  c.有些频度副词可放在句首或句尾,用来表示强调。如:‎ ‎  Sometimes I walk home, sometime I ride a bike.‎ ‎  有时我步行回家,有时我骑自行车。‎ ‎  3.never放在句首时,主语、谓语动词要倒装。如:‎ ‎  Never have I been there.我从没到过那儿。‎ ‎5) every day 与 everyday ‎  1. every day 作状语,译为"每一天"。如:‎ ‎  We go to school at 7:10 every day.‎ ‎  我们每天7:10去上学。‎ ‎  I decide to read English every day.‎ ‎  我决定每天读英语。‎ ‎  2. everyday 作定语,译为"日常的"。‎ ‎  She watches everyday English on TV after dinner.‎ ‎  她晚饭后在电视上看日常英语。‎ ‎  What's your everyday activity?  你的日常活动是什么?‎ ‎6) 什么是助动词 ‎  1.协助主要动词构成谓语动词词组的词叫助动词(Auxiliary Verb)。被协助的 ‎  动词称作主要动词(Main Verb)。助动词自身没有词义,不可单独使用,‎ ‎  例如:He doesn't like English. 他不喜欢英语。‎ ‎  (doesn't是助动词,无词义;like是主要动词,有词义)‎ ‎  2.助动词协助主要动词完成以下功用,可以用来:‎ ‎  a. 表示时态,例如:‎ ‎  He is singing. 他在唱歌。‎ ‎  He has got married. 他已结婚。‎ ‎  b. 表示语态,例如:‎ ‎  He was sent to England. 他被派往英国。‎ ‎  c. 构成疑问句,例如:‎ ‎  Do you like college life? 你喜欢大学生活吗?‎ ‎  Did you study English before you came here?‎ ‎  你来这儿之前学过英语吗?‎ ‎  d. 与否定副词not合用,构成否定句,例如:‎ ‎  I don't like him.  我不喜欢他。‎ ‎  e. 加强语气,例如:‎ ‎  Do come to the party tomorrow evening. 明天晚上一定来参加晚会。‎ ‎  He did know that.  他的确知道那件事。‎ ‎  3.最常用的助动词有:be, have, do, shall, will, should, would ‎ 7) forget doing/to do与remember doing/to do ‎  1.forget to do忘记要去做某事(未做);forget doing忘记做过某事(已做)‎ ‎  The light in the office is still on. He forgot to turn it off.‎ ‎  办公室的灯还在亮着,它忘记关了。(没有做关灯的动作)‎ ‎  He forgot turning the light off.‎ ‎  他忘记他已经关了灯了。( 已做过关灯的动作)‎ ‎  Don't forget to come tomorrow.‎ ‎  别忘了明天来。(to come动作未做)‎ ‎  典型例题 ‎  ---- The light in the office is still on.‎ ‎  ---- Oh,I forgot___.‎ ‎  A. turning it off  B. turn it off ‎  C. to turn it off  D. having turned it off ‎  答案:C。由the light is still on 可知灯亮着,即关灯的动作没有发生,‎ ‎  因此用forget to do sth.而forget doing sth 表示灯已经关上了,而 ‎  自己忘记了这一事实。此处不符合题意。‎ ‎  2.remember to do记得去做某事(未做);‎ ‎  remember doing记得做过某事(已做)‎ ‎  Remember to go to the post office after school.‎ ‎  记着放学后去趟邮局。‎ ‎  Don't you remember seeing the man before?‎ ‎  你不记得以前见过那个人吗?‎ ‎8) It's for sb.和 It's of sb.‎ ‎  1.for sb. 常用于表示事物的特征特点,表示客观形式的形容词,如:‎ ‎  easy, hard,difficult,interesting,impossible等:‎ ‎  It's very hard for him to study two languages.‎ ‎  对他来说学两门外语是很难的。‎ ‎  2.of ‎ sb的句型一般用表示人物的性格,品德,表示主观感情或态度的形容词,‎ ‎  如:good, kind, nice, clever, foolish, right。‎ ‎  It's very nice of you to help me. 你来帮助我,你真是太好了。‎ ‎  3.for 与of 的辨别方法:‎ ‎  用介词后面的代词作主语,用介词前边的形容词作表语,造个句子。如果道理上通顺用of,不通则用for。如:‎ ‎  You are nice. (通顺,所以应用of)。‎ ‎  He is hard. (人是困难的,不通,因此应用for。)‎ ‎9) 对两个句子的提问 ‎  新目标英语在命题中有将对句子划线提问这一题型取消的趋势,现在采取的作 ‎  法是对一个句子进行自由提问。例如:‎ ‎  句子:The boy in blue has three pens.‎ ‎  提问:1. Who has three pens?‎ ‎     2. Which boy has three pens?‎ ‎     3. What does the boy in blue have?‎ ‎     4. How many pens does the boy in blue have?‎ ‎  很显然,学生多了更多的回答角度,也体现了考试的灵活性。再如:‎ ‎  句子:He usually goes to the park with his friends at 8:00 on Sunday.‎ ‎  提问:1. Who usually goes to the park with his friends at 8:00 on ‎ Sunday?‎ ‎     2. Where does he usually go with his friends at 8:00 on Sunday?‎ ‎     3. What does he usually do with his friends at 8:00 on Sunday?‎ ‎     4. With whom does he usually go to the park at 8:00 on Sunday?‎ ‎     5. What time does he usually go to the park with his friends on Sunday?‎ ‎     6. When does he usually go to the park with his friends?‎ ‎10) so、such与不定冠词的使用 ‎  1.so与不定冠词a、an连用,结构为"so+形容词+a/an+名词"。如:‎ ‎  He is so funny a boy.‎ ‎  Jim has so big a house.‎ ‎  2.such与不定冠词a、an连用,结构为"such+a/an+形容词+名词"。如:‎ ‎  It is such a nice day.‎ ‎  That was such an interesting story.‎ ‎ 11) 使用-ing分词的几种情况 ‎  1.在进行时态中。如:‎ ‎  He is watching TV in the room.‎ ‎  They were dancing at nine o'clock last night.‎ ‎  2.在there be结构中。如:‎ ‎  There is a boy swimming in the river.‎ ‎  3.在have fun/problems结构中。如:‎ ‎  We have fun learning English this term.‎ ‎  They had problems getting to the top of the mountain.‎ ‎  4.在介词后面。如:‎ ‎  Thanks for helping me.‎ ‎  Are you good at playing basketball?‎ ‎  5.在以下结构中:‎ ‎  enjoy doing sth  乐于做某事 ‎  finish doing sth  完成做某事 ‎  feel like doing sth 想要做某事 ‎  stop doing sth 停止做某事 ‎  forget doing sth 忘记做过某事 ‎  go on doing sth 继续做某事 ‎  remember doing sth 记得做过某事 ‎  like doing sth 喜欢做某事 ‎  keep sb doing sth 使某人一直做某事 ‎  find sb doing sth 发现某人做某事 ‎  see/hear/watch sb doing sth ‎  看到/听到/观看某人做某事 ‎  try doing sth 试图做某事 ‎  need doing sth 需要做某事 ‎  prefer doing sth 宁愿做某事 ‎  mind doing sth 介意做某事 ‎  miss doing sth 错过做某事 ‎  practice doing sth 练习做某 ‎  be busy doing sth 忙于做某事 ‎  can't help doing sth禁不住做某事 ‎ 12) 英语中的"单数"‎ ‎  1.主语的第三人称单数形式,即可用"he, she, it"代替的。如:‎ ‎  he,she, it,my friend, his teacher, our classroom, Tom, Mary's uncle ‎  2.名词有单数名词和复数名词。如:‎ ‎  man(单数)---men(复数) banana(单数)---bananas(复数)‎ ‎  3.动词有原形,第三人称单数形式,-ing分词,过去式,过去分词。如:‎ ‎  go---goes---going---went---gone ‎  work---works---working---worked---worked ‎  watch---watches---watching---watched---watched ‎  当主语为第三人称单数的时候,谓语动词必须用相应的第三人称单数形式。‎ ‎  如:‎ ‎  The boy wants to be a sales assistant.‎ ‎  Our English teacher is from the US.‎ ‎  Their daughter makes her breakfast all by herself.‎ ‎13) 名词的复数构成的几种形式 ‎  名词复数的构成可分为规则变化和不规则变化两种。‎ ‎  I 名词复数的规则变化 ‎  1.一般在名词词尾加-s。如:‎ ‎  pear---pears hamburger---hamburgers ‎  desk---desks          tree---trees ‎  2.以字母-s, -sh, -ch, -x结尾的名词,词尾加-es。如:‎ ‎  class---classes dish---dishes ‎  watch---watches box---boxes ‎  3.以字母-o结尾的某些名词,词尾加-es。如:‎ ‎  potato---potatoes tomato---tomatoes ‎  Negro---Negroes hero---heroes ‎  4.以辅音字母加-y结尾的名词,将-y变为-i,再加-es。如:‎ ‎  family---families dictionary---dictionaries ‎  city---cities country---countries ‎  5.以字母-f或-fe结尾的名词,将-f或-fe变为-v,再加-es。如:‎ ‎  half---halves leaf---leaves ‎  thief---thieves knife---knives ‎  self---selves wife---wives ‎  life---lives wolf---wolves ‎  shelf---shelves loaf---loaves ‎  但是:‎ ‎  scarf---scarves(fes) roof---roofs ‎  serf---serfs gulf---gulfs ‎  chief---chiefs proof---proofs ‎  belief---beliefs ‎  II 名词复数的不规则变化 ‎  1.将-oo改为--ee。如:‎ ‎  foot---feet tooth---teeth ‎  2.将-man改为-men。如:‎ ‎  man---men woman---women ‎  policeman---policemen postman---postmen ‎  3.添加词尾。如:‎ ‎  child---children ‎  4.单复数同形。如:‎ ‎  sheep---sheep deer---deer ‎  fish---fish people---people ‎  5.表示"某国人"的单、复数变化。‎ ‎  即"中日瑞不变英法变,其它国把-s加后面"。如:‎ ‎  Chinese---Chinese Japanese---Japanese Swiss---Swiss ‎  Englishman---Englishmen Frenchman---Frenchmen ‎  American---Americans Australian---Australians ‎  Canadian---Canadians Korean---Koreans ‎  Russian---Russians Indian---Indians ‎  6.其它。如:‎ ‎  mouse---mice ‎  apple tree---apple trees ‎  man teacher---men teachers ‎  14) 双写最后一个字母的-ing分词 ‎  初中阶段常见的有以下这些:‎ ‎  1.let→letting   让 ‎   hit→hitting   打、撞 ‎   cut→cutting   切、割 ‎   get→getting   取、得到 ‎   sit→sitting   坐 ‎   forget→forgetting  忘记 ‎   put→putting  放 ‎   set→setting  设置 ‎   babysit→babysitting  临时受雇照顾婴儿 ‎  2.shop→shopping   购物 ‎   trip→tripping   绊 ‎   stop→stopping   停止 ‎   drop→dropping  放弃 ‎  3.travel→travel(l)ing  旅游 ‎   swim→swimming    游泳 ‎   run→running     跑步 ‎   dig→digging    挖、掘 ‎   begin→beginning  开始 ‎   prefer→preferring 宁愿 ‎   plan→planning 计划 ‎15) 肯定句变否定句及疑问句要变化的一些词 ‎  1.some变为any。如:‎ ‎  There are some birds in the tree.→There aren't any birds in the tree.‎ ‎  但是,若在表示请邀请、请求的句子中,some可以不变。如:‎ ‎  Would you like some orange juice?‎ ‎  与此相关的一些不定代词如something, somebody等也要进行相应变化。‎ ‎  2.and变为or。如:‎ ‎  I have a knife and a ruler.→I don't have a knife or a ruler.‎ ‎  3.a lot of (=lots of)变为many或much。如:‎ ‎  They have a lot of friends.(可数名词)→They don't have many friends.‎ ‎  There is lots of orange in the bottle.(不可数名词)‎ ‎  →There isn't much orange in the bottle.‎ ‎  4.already变为yet。如:‎ ‎  I have been there already.→I haven't been there yet.‎ ‎16) in与after ‎  in 与 after 都可以表示时间,但二者有所区别。‎ ‎  1.in 经常用于将来时的句子中,以现在为起点,表示将来一段时间。如:‎ ‎  He will leave for Beijing in a week. 一周后他会动身去北京。‎ ‎  2.after 经常用于过去时的句子中,以过去为起点,表示过去一段时间。如:‎ ‎  He left for Beijing after a week.  一周后他动身去了北京。‎ ‎  不过,如果after后跟的是具体的时刻,它也可用于将来时。如:‎ ‎  We will finish the work after ten o'clock.十点后我们会完成工作的。‎ ‎  3.注意区分以下的in的用法。‎ ‎  I'll visit him in a week.  一周后我会去拜访他。‎ ‎  I'll visit him twice in a week. 一周内我会去拜访他两次。‎ ‎17) 不定冠词a与an的使用 ‎  1.a 用在以辅音音素开头的单词前。如:‎ ‎  There is a "b" in the word "book". 单词book中有个字母b。‎ ‎  类似的字母还有:c, d, g, j, k, p, q, t, u, v, w, y, z。‎ ‎  She has a small knife.   她有一把小刀。‎ ‎  2.an 用于以元音音素开头的单词前。如:‎ ‎  There is an "i" in the word "onion".   单词onion中有个字母i。‎ ‎  类似的字母还有:a, e, f, h, l, m, n, o, r, s, x。‎ ‎  Do you have an umbrella?   你有一把雨伞吗?‎ ‎  3.以元音字母开头的单词前面不一定都用an;以辅音字母开头的单词前面也不一定都用a.如:‎ ‎  a useful book ‎  a universe ‎  a one-letter word ‎  an hour ‎  an uncle ‎  an umbrella ‎  an honest person ‎18) 如何表达英语中的"穿、戴"?‎ ‎  英语中表示"穿、戴"的表达方法有好几种,常见的有以下这些:‎ ‎  1、put on 主要表达"穿"的动作。如:‎ ‎  He put on his coat.他穿上了他的外套。‎ ‎  You'd better put on your shoes.你最好穿上你的鞋子。‎ ‎  2、wear 主要表示"穿、戴"的状态。如:‎ ‎  The old man wears a pair of glasses.老人戴着一副眼镜。‎ ‎  The girl is wearing a red skirt.那女孩穿着一条红色的短裙。‎ ‎  3、dress 可作及物动词,有"给......穿衣"的意思,后接"人",而不是"衣服"。如:‎ ‎  Please dress the children right now.请立即给孩子们穿上衣服。‎ ‎  dress 也可作不及物动词,表示衣着的习惯。如:‎ ‎  The woman always dresses in green.那位妇女总是穿绿色的衣服。‎ ‎  4、be in 表示穿着的状态。如:‎ ‎  John is in white today.约翰今天穿白色的衣服。‎ ‎  The man in black is a football coach.‎ ‎19)a little, a few 与 a bit (of)   a little, a few 与 a bit (of) 都有"一些、少量"的意义。他们的区别:‎ ‎  1. a little 意为"一些、少量",后接不可数名词。如:‎ ‎  There is a little water in the bottle. 瓶子里有一点水。‎ ‎  还可以接形容词。如:‎ ‎  He is a little shy. 他有些害羞。‎ ‎  2. a few 意为"一些、少数",后接复数的可数名词。如:‎ ‎  There are a few people in the room. 房间里有一些人。‎ ‎  3. a bit 意为"一点儿",后接形容词。如:‎ ‎  It's a bit cold. 有点冷。‎ ‎  a bit of 后接不可数名词。如:‎ ‎  He has a bit of money. 他有一点儿钱。‎ ‎  4. a little和a few表肯定意义,little和few表否定意义;如:‎ ‎  There is a little soda in the glass. 杯子里有一点儿汽水。‎ ‎  There is little soda in the glass. 杯子里几乎没有汽水了。‎ ‎  I have a few Chinese friends. 我有一些中国朋友。‎ ‎  Few people like him. 几乎没有人喜欢他。‎ ‎  5. a little = a bit of, 后接不可数名词;‎ ‎  a little = a bit = a little bit = kind of, 后接形容词,意为"有 ‎  点儿"。‎ ‎20) 关于like的用法 ‎  like 可以作动词,也可以作介词。‎ ‎  1、like 作动词,表示一般性的"爱好、喜欢",有泛指的含义。如:‎ ‎  Do you like the color? 你喜爱这种颜色吗?‎ ‎  like 后可接不定式(like to do sth),也可接动词的-ing分词(like doing sth),有时意思不尽相同。如:‎ ‎  She likes eating apples.她喜爱吃苹果。(习惯)‎ ‎  She likes to eat an apple.她喜爱吃一粒苹果。(平常不喜欢吃)‎ ‎  like 与 would 连用,后接不定式,表示愿望或客气的请求。如:‎ ‎  Would you like a cup of tea? 您愿意喝杯茶吗?‎ ‎  "喜欢某人做某事"可以用结构"like sb to do sth/doing sth"。如:They all like me to sing/singing English songs.‎ ‎  他们都喜欢我唱英文歌。‎ ‎  2、like 作介词,可译成"像......"。如:‎ ‎  She is friendly to us like a mother.她对我们友好,就像母亲一样。‎ ‎  It looks like an orange.它看起来像个桔子。‎ ‎  3、区分以下句子:‎ ‎  A. What does he look like? 他长相如何?(指一个人的外貌特征)‎ ‎  B. What is he like? 他人怎么样? (指人的性格特点)‎ ‎  C. The boy like Peter is over there. (句指外貌相似)‎ ‎  D. A boy like Peter can't do it. (指性格相似)‎ ‎21) stop to do sth 与 stop doing sth ‎  1. stop to do sth 意为"停下来去做某事"。如:‎ ‎  The students stop to listen to their teacher.‎ ‎  学生们停下来去听他们老师讲话。‎ ‎  2. stop doing sth 意为"停止做某事"。如:‎ ‎  The students stopped talking. 学生们停止了谈话。‎ ‎  与它们相反的句式是:go on to do sth "继续做某事(与刚才一事不同)"‎ ‎  和 go on doing sth "继续做某事(与刚才同一件事)"。如:‎ ‎  He finishes his homework and goes on to study English.‎ ‎  他完成了作业,接着继续去念英语。‎ ‎  They went on playing games. 他们继续玩游戏。‎ ‎22) tell, speak, say 与 talk ‎  1. tell 意为"告诉、讲述",指某人把某一件事、一条信息传送给别人或讲 ‎  述一件事。如:‎ ‎  He tells me that he wants to be a teacher.‎ ‎  他告诉我说他想成为一位教师。‎ ‎  Father always tells interesting stories to us.‎ ‎  爸爸总是给我们讲有趣的故事。‎ ‎  tell sb sth 意为"告知某人某事"。如:‎ ‎  He told me something about his past. 他告诉我一些他的往事。‎ ‎  tell sb to do sth 意为"告诉某人去做某事"。如:‎ ‎  David told his son to do the homework. 大卫要他的儿子去做作业。‎ ‎  2. speak 意为"说话、讲话",后面主要接语言。如:‎ ‎  He can speak English and a little Chinese.‎ ‎  他能讲英语和一点汉语。‎ ‎  speak to 意为"和.....讲话、谈话"。如:‎ ‎  Can I speak to Mr Zhang?   我能和张先生讲话吗?‎ ‎  speak of 意为"提到、说起"。如:‎ ‎  The book speaks of my hometown. 那本书提到我的家乡。‎ ‎  3. talk 意为"谈话、讲话",如果只有一方对另一方说话时,一般用 talk to;‎ ‎  如果双方或多方交谈,多用 with。如:‎ ‎  Please talk to him right now. 请立即同他谈话。‎ ‎  He is talking with his friend. 他在和朋友交谈。‎ ‎  talk about 意为"谈论......"。如:‎ ‎  They are talking about the movie. 他们在谈论那部电影。‎ ‎  have a talk with 意为"与......交谈"。如:‎ ‎  Can I have a talk with you? 我可以和你交谈吗?‎ ‎  4. say 意为"说"。如:‎ ‎  Can you say it in English once more? 你能用英语再说一遍吗?‎ ‎  say to 意为"对......说"。如:‎ ‎  He said to his students that they would have a test.‎ ‎  他对他的学生说他们将有一个测试。‎ ‎  It is said that... 意为"据说"。如:‎ ‎  It is said that he could stay under the water for a long time.‎ ‎  据说他能呆在水里很长时间。‎ ‎23) Excuse me! 与 I'm sorry!‎ ‎  1. Excuse me! 意为"打搅了!对不起!",一般是为了与陌生人搭话,或者要打断对方所说(做)的事。如:‎ ‎  Excuse me, is there a hotel in the neighborhood?‎ ‎  请问,附近有旅馆吗?‎ ‎  Excuse me, could I say something? 打搅一下,我能说一些吗?‎ ‎  2. I'm sorry! 意为"对不起!",表示道歉。如:‎ ‎  I'm sorry, Mr Zhang. I won't do it again.‎ 对不起,张先生。我不会这么做了。‎ ‎24) 表示时间的 in、on 与 at in, on 与 at 都可以和表示时间的词(组)连用。‎ ‎1. in 表示时间的一段或较长的时间。如:‎ in the morning 在上午     in May, 2004 在2004年五月 in a week 在一周之内(后)‎ ‎ It's Sunday, I can finish it in two days.‎ 现在是星期天,我能在两天后完成。(星期二)‎ Rome‎ was not built in a day. 罗马不是在一天内建起来的。‎ ‎2. on 主要指在具体的一天。如:‎ on Sunday 在星期天     on May Day 在"五一"节 on a hot afternoon 在一个炎热的下午 He arrived in Beijing on April 26,2004.‎ 他于2004年4月26日到达北京。‎ ‎3. at 表示时间的一点或比较短的时间。如:‎ at 8:00 在八点     at noon 在中午 I always get up at 6:00 every morning. 我总是每天早晨六点起床。‎ It's always warm at this time of year. 每年的这个时候总是暖和的。‎
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