推荐回答(3个)
Or 的用法展播厅
第一展厅:在肯定句中,意为"或者;或"。如:
You or your mother has to go. 你或你妈妈一定要去。
另外,or 常与either 连用,构成"either...or..."结构,意为"或者……或者……;要么……要么……;不是……就是……",后接并列成分,在句中作主语、宾语、表语、谓语等,连接并列成分作主语时,谓语动词应与or后的主语保持一致。如:
Either you or I am wrong. 不是你错就是我错。
The rulers here are either too long or too short. 这儿的尺子不是太长就是太短。
Please either come in or go out. 请你或进来或出去。
第二展厅:在选择疑问句中,连接被选择的部分,意为"或者;还是"。如:
Is the pen yours or mine? 这枝钢笔是你的还是我的?
Are you going to Beijing or Shanghai? 你要去北京还是上海?
第三展厅:在否定句中,连接并列成分,意为"与;和"。如:
At that time I had no food or money. 在那个时候,我无食无钱。
The baby can't cry or smile. 那个婴儿不会哭也不会笑。
第四展厅:在句型"祈使句+or+陈述句"中,相当于if 引导的否定条件句;此时,or 意为"否则;要不然"。如:
Hurry up, or you will be late. 赶快,否则,你会迟到。
Study hard, or you will fall behind others. 努力学习,否则,你会落在他人后面。
参考资料: http://www.ruziniu.com.cn/englishteaching/schoolenglish/gradetwoenglish/200409/248.html
楼主,你好。or可以用于警告和忠告,当“否则”的意思讲。
连词or在初中英语中是个常用,虽然它只有一个词性,但它却有不同的使用情况。现将主要用法分述如下:
一、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 or bread? 他喜欢牛奶还是面包吗?
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 likes bread.
二、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.
三、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.→If you don't hurry up,you will be late for the meeting.
四、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(连接表语)
He either does his homework or watches TV on Sundays.他星期天要么做作业,要么看电视。(连接谓语)
We play either football or basketball in the afternoon.下午我们不是踢足球就是打篮球。(连接宾语)
五、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
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