Or和and的用法

1、Or和and的用法一、連詞or主要用法分述如下： 1、用在選擇疑問(wèn)句中連結(jié)被選擇的對(duì)象，意為“或者，還是”。例如： Is he a doctor or a teacher? 他是醫(yī)生還是教師？ Did you do your homework or watch TV last night? 你昨晚做作業(yè)還是看電視了？ Are they singing or reading English? 他們是在唱歌還是在讀英語(yǔ)？ 下列兩個(gè)疑問(wèn)句中的并列成份由于使用了不同的連詞，因而句式有所不同。試比較： A、Does he like milk and bread? 他喜歡牛奶或者面包嗎？ B、Does h

2、e like milk or bread? 他喜歡牛奶還是面包？ 分析：A 句中使用了連詞and,是一般疑問(wèn)句，對(duì)其作肯定或否定回答應(yīng)用：Yes, he does. No, he doesnt. B句中使用了并列連詞or,因而是選擇疑問(wèn)句，對(duì)其回答不用“yes”或“no”，而應(yīng)根據(jù)實(shí)際情況直接選擇回答：He likes milk.或：He likes bread. 2、用于否定句中連結(jié)并列成分，表示“和，與”之意。例如： There isnt any air or water on the moon.月球上既沒(méi)有空氣也沒(méi)有水。 The baby is too young. He cant sp

3、eak or walk.那嬰兒太小，他不會(huì)說(shuō)話，也不會(huì)走路。 He hasnt got any brothers or sisters.他沒(méi)有兄弟和姐妹。 肯定句中并列連詞應(yīng)用and，在把含有and的肯定句改為否定句時(shí)，莫忘把連詞and改為or。例如： The students sang and danced in the park yesterday. The students didnt sing or dance in the park yesterday. 3、用于句型“祈使句+or+陳述句”中，表示在以祈使句為條件下的相反假設(shè)，意為“否則，要不然”。例如： Work hard,or

4、you will fall behind.你要努力學(xué)習(xí)，否則會(huì)落后。 Get up early tomorrow,or you will miss the early train.你明天要早點(diǎn)起身，要不然就趕不上早班火車了。 Dont jump the queue,or other peopoe will not be pleased.別插隊(duì)，否則別人會(huì)不高興的。 可以把這類句型中的祈使句換為一個(gè)條件句（注意改寫時(shí)應(yīng)去掉連詞or）。例如： Hurry up,or you will be late for the meeting.If you dont hurry up,you will be

5、late for the meeting. 4、用于“eitheror”結(jié)構(gòu)中，意為“不是就是”，“要么要么”。連結(jié)的并列成份可在句中作主語(yǔ)、表語(yǔ)、謂語(yǔ)、賓語(yǔ)等。（注意：連結(jié)并列成份作主語(yǔ)時(shí)，謂語(yǔ)動(dòng)詞通常與or后的部分保持一致。）例如： Either she or I am right.不是她對(duì)就是我對(duì)。（連接主語(yǔ)） The shoes in the shop were either too big or too small for me. 店里的鞋對(duì)我來(lái)說(shuō)不是太大就是太小He either does his homework or watches TV on Sundays.他星期天要么做作

6、業(yè)，要么看電視。（We play either football or basketball in the afternoon.下午我們不是踢足球就是打籃球。5、用于連結(jié)并列成份，表示不確切、模糊的陳述。例如： This story happened five or six years ago. 這個(gè)故事發(fā)生在四、五年前。 -Is the street straight? -More or less. -這棵樹直嗎？ -差不多。 She will find that she was wrong sooner or later.她遲早會(huì)發(fā)現(xiàn)她是錯(cuò)的6、 并列結(jié)構(gòu)中，or通常用于否定句，and用于

7、肯定句。7、 但有時(shí)and 也可用于否定句。請(qǐng)注意其不同特點(diǎn)：There is no air or water in the moon.There is no air and no water on the moon.在否定中并列結(jié)構(gòu)用or 連接，但含有兩個(gè)否定詞的句子實(shí)際被看作是肯定結(jié)構(gòu)，因此要用and。典型例題 -I dont like chicken _ fish. -I dont like chicken, _ I like fish very much. A. and； and B. and； butC. or； butD. or；and 答案C。否定句中表并列用or, but 表轉(zhuǎn)

8、折。 1） or意思為否則。例如： I must work hard, or Ill fail in the exam. 我要努力學(xué)習(xí)，否則考試要不及格了。2） eitheror意思為或者或者。注意謂語(yǔ)動(dòng)詞的主謂一致采用就近原則。例如： Either you or I am right. 不是你對(duì)，就是我對(duì)。二、連詞and主要用法分述如下:1、連接句子中的并列的各個(gè)成分如主語(yǔ) 、謂語(yǔ)、 賓語(yǔ)、 定語(yǔ)、狀語(yǔ)等。表示并列和遞進(jìn)等關(guān)系，意思是“和”、“同”、“又”、“兼”、“加”等，也可不譯。例如： Lucy and I go to school six days a week. His work

9、starts at half past eight ,and finishes at a quarter to five. She works very hard and is very helpful. She is wearing a green trousers, and a yellow sweater.2、連接兩個(gè)結(jié)構(gòu)對(duì)等的句子。表示并列和對(duì)比等關(guān)系，意思是“而且”“還”“也” “而”等，?？刹蛔g。例如：They teach us Chinese and we teach them English.It isnt a plane, and it isnt a bike.The day

10、s get shorter and the nights get longer.The weather gets warmer, and the days get longer.11、連接兩個(gè)結(jié)構(gòu)非對(duì)等的句子。表示次序、因果、遞進(jìn)、轉(zhuǎn)折等關(guān)系，意思是“然后”、“所以”、“結(jié)果”、“而且”、“也”、“但是” 等，有時(shí)也可不譯。例如： I have breakfast at 7:30 and then I go to school. It is harvest time,and all the farmers are very busy. The weather was very cold, an

11、d many people were ill. After lunch Aunt Huang came in and she looked worried.12、連接兩個(gè)句子，結(jié)構(gòu)是“祈使句+and+句子”。 表示條件和結(jié)果關(guān)系，（即前面的句子相當(dāng)于一個(gè)由 “If”引導(dǎo)的假設(shè)句，后面的句子表示結(jié)果），意思是“那么”、“就會(huì)”。例如：Play as well as you can,and were sure to beat them. =If you play as well as you can,were sure to beat themKeep passing the ball to ea

12、ch other,and youll be ok!=If you keep passing the ball to each other, youll be ok!13、連接兩個(gè)動(dòng)詞。用于“go(come,stop,write,etc.)+and+動(dòng)詞”結(jié)構(gòu)中，表示目的、意圖，意思是“為了”和“來(lái)”等，通常不譯。例如： I must go and play games. (=I must go to play games) Lets go and find them. You and Lily must come over to my house and see! Stop and put y

13、our hands in front of you now. You must get up and get ready for school.14、連接兩個(gè)相同的詞。表示反復(fù)、連續(xù)等。意思是“又”、“接連”等。例如： The baby laughed and laughed. They talked on and on very happily.15、連接兩個(gè)相對(duì)的詞。用作狀語(yǔ)。例如：He uses a lift to go up and down.16、連接兩個(gè)形容詞的比較級(jí)的詞。表示程度的變化，意思是“越來(lái)越”。 例如：But she looked at me and cried harder and harder.The worlds population is growing faster and faster.17、用于句首。表示承上啟下的作用，意思是“于是”、“然后”、“而且“等也可不譯。例如： And Im polly!