Or 和 and 的用法一、连词 or 主要用法分述如下:1、用在选择疑问句中连结被选择的对象,意为 “或者,还是 ”例如:Is he a doctor or a teacher?他是医生还是教师?Did you do your homework or watch TV last night? 你昨晚做作业还是看电视了?Are they singing or reading English?他们是在唱歌还是在读英语?下列两个疑问句中的并列成份由于使用了不同的连词,因而句式有所不同试比较:A、Does he like milk and bread? 他喜欢牛奶或者面包吗?B、Does he like milk or bread? 他喜欢牛奶还是面包?分析: A 句中使用了连词 and,是一般疑问句,对其作肯定或否定回答应用 :Yes, he does. No, he doesn't. B 句中使用了并列连词 or,因而是选择疑问句,对其回答不用 “yes或”“no,”而应根据实际情况直接选择回答: He likes milk. 或: He likesbread.2、用于否定句中连结并列成分,表示“和,与 ”之意。
例如:There isn't any air or water on the moon. 月球上既没有空气也没有水The baby is too young. He can't speak or walk.那婴儿太小,他不会说话,也不会走路He hasn't got any brothers or sisters.他没有兄弟和姐妹肯定句中并列连词应用 and,在把含有 and 的肯定句改为否定句时 ,莫忘把连词 and 改为 or例如:The students sang and danced in the park yesterday.→ The students didn't sing or dance in the park yesterday.3、用于句型 “祈使句 +or+陈述句 ”中,表示在以祈使句为条件下的相反假设,意为“否则,要不然 ”例如:Work hard,or you will fall behind. 你要努力学习,否则会落后Get up early tomorrow,or you will miss the early train.你明天要早点起身 ,要不然就赶不上早班火车了。
Don't jump the queue,or other peopoe will not be pleased.别插队,否则别人会不高兴的可以把这类句型中的祈使句换为一个条件句(注意改写时应去掉连词 or)例如:Hurry up,or you will be late for the meeting. → Ifyou don't hurry up,you will be late for the meeting.4、用于 “ either or ”结构中,意为 “不是 就是 ”,“要么 要么 ”连结的并列成份可在句中作主语、表语、谓语、宾语等注意:连结并列成份作主语时,谓语动词通常与 or 后的部分保持一致例如:Either she or I am right.不是她对就是我对连接主语)The shoes in the shop were either too big or too small for me. 店里的鞋对我来说不是太大就是太小He either does his homework or watchesTV on Sundays.他星期天要么做作业,要么看电视We play either football or basketball in theafternoon.下午我们不是踢足球就是打篮球。
5、用于连结并列成份,表示不确切、模糊的陈述例如:This story happened five or six years ago. 这个故事发生在四、五年前Is the street straight? --More or less.--这棵树直吗? --差不多She will find that she was wrong sooner or later.她迟早会发现她是错的6、 并列结构中, or 通常用于否定句, and 用于肯定句7、 但有时 and 也可用于否定句请注意其不同特点:There is no air or water in the moon.There is no air and no water on the moon.在否定中并列结构用 or 连接,但含有两个否定词的句子实际被看作是肯定结构,因此要用 and典型例题fish.---I don't like chicken ___---I don't like chicken, ___ I likefish very much.or;A. and; andbut D. or;andB. and;butC.答案 C。
否定句中表并列用 or, but 表转折1) or 意思为 "否则 "例如:I must work hard, or I'll fail in theexam. 我要努力学习,否则考试要不及格了2) either or 意思为 " 或者 或者 "注意谓语动词的主谓一致采用就近原则例如:Either you or I am right. 不是你对,就是我对二、连词 and 主要用法分述如下 :1、连接句子中的并列的各个成分如主语 、谓语、 宾语、 定语、状语等表示并列和递进等关系,意思是 “和 ”、“同”、“又 ”、“兼”、“加 ”等,也可不译例如:① Lucy and I go to school six days a week.② His work starts at half past eight ,and finishes at a quarter to five.③ She works very hard and is very helpful.④ She is wearing a green trousers, and a yellow sweater.2、连接两个结构对等的句子。
表示并列和对比等关系,意思是“而且”“还”“也” 而“”等,常可不译例如:① They teach us Chinese and we teachthem English.② It isn ’t a plane, and it isn ’t a bike.③ The days get shorter and the nights getlonger.④ The weather gets warmer, and the daysget longer.11、连接两个结构非对等的句子表示次序、因果、递进、转折等关系,意思是“然后 ”、“所以 ”、 , “结果 ”、“而且 ”、“也”、“但是 ” 等,有时也可不译 例如:① I have breakfast at 7:30 and then I go toschool.② It is harvest time,and all the farmers arevery busy.③ The weather was very cold, and manypeople were ill.④ After lunch Aunt Huang came in andshe looked worried.12、连接两个句子,结构是 “祈使句 +and+ 句子 ”。
表示条件和结果关系,(即前面的句子相当于一个由 “If 引”导的假设句,后面的句子表示结果) ,意思是 “那么”、“就会 ”例如:① Play as well as you can,and we ’re sureto beat them. =If you play as well as you can,we ’ re sure to beat them② Keep passing the ball to each other,andyou ’ ll be ok!=If you keep passing the ball to each other, you be ok!’ll13、连接两个动词用于“ go(come,stop,write,etc.)+and+动词 ”结构中,表示目的、意图,意思是 “为了 ” 和“来”等,通常不译例如:① I must go and play games. (=I must goto play games)② Let ’s go and find them.③ You and Lily must come over to myhouse and see!④ Stop and put your hands in front of younow.⑤ You must get up and get ready forschool.14、连接两个相同的词。
表示反复、连续等意思是 “又 ”、“接连 ”等例如:① The baby laughed and laughed.② They talked on and on very happily.15、连接两个相对的词用作状语例如:① He uses a lift to go up and down. 16、连接两个形容词的比较级的词表示程度的变化,意思是 “越来越 ” 例如:① But she looked at me and cried harderand harder.② The world ’spopulation is growingfaster and faster.17、用于句首表示承上启下的作用,意思是 “于是 ”、“然后 ”、 “而且 “等也可不译例如:① And I ’m polly!② I ’m fine,thanks.And you?(And you ?=And how are you ?)③ And what ’s this?④ And we can have a drink oforange,too!18、用在数词中表示十位数和百位数之间的关系有 “加 ”之意,可不译。
例如:① one hund。