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应不少条友的私信要求,整理一些基础语法知识,希望对大家的学习有所帮助。本文主要学习《连词辨析(and与or)》。欢迎留言或私信交流,共同进步。
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1.连接并列成分且表示“和”之意时,and通常用于肯定句,or通常用于否定句; 如果句中并列连词所连接的两个结构都是否定结构,用and而不用or。例如:
- Do it slowly and carefully. 要慢慢仔细地做。
- Can he read and write? 他能读会写吗?
- I've got tired of looking at nature through dirty curtains and dusty windows. 我厌倦了透过肮脏的窗帘和满是灰尘的窗户看大自然。
- He had no food or water and he was in terrible pain.他没有食物和水,非常痛苦。
- He can't read or write. 他不会读,不会写。
- There is no water and no air on the moon.月球上没有水和空气。
2.or可用于表选择,意为“或者,还是”,而 and 无此用法。例如:
- Is your sister older or younger than you? 你的姐妹比你大还是小?
- It can be black, white or grey. 它可能是黑的、白的或灰的。
3.or可用于两个数字之间,表示“大约”,而and无此用法。例如:
- There were six or seven of us there. 我们约有六、七个人在场。
- For three years, I have had very bad headaches about three or four times a month. 三年来,我每个月都会严重头痛三四次。
- I'll present it to you in one or two days. 一两天后我会把它提交给你。
4.“祈使句 and/or 陈述句”句型中,and表顺承,可译为“就”,此时祈使句相当于if引导的条件状语从句; or表示以祈使句为条件的相反假设,意为“否则,要不然”,可用or else或otherwise替换,此时祈使句相当于if...not…引导的条件状语从句。例如:
- Take more exercise and you will feel healthy = If you take more exercise, you will feel healthy. 多锻炼身体,你就会身体健康。
- Be careful or you’ll make more mistakes. = If you are not careful, you’ll make more mistakes. 细心点,不然你会犯更多的错误。
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欢迎大家关注、留言、点赞和转发,更多有用的知识每日更新,助力考上985!
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