倍数表达法知识点归纳,英语表示倍数的句型结构
Jennifer: How was your trip in Hong Kong , Vicki?
Vicki: Not bad.
Jennifer: I heard that prices there are higher than those in Shanghai. Is it true?
Vicki: Yes, it’s true. Personally speaking, prices in Hong Kong are twice higher than those in Shanghai.
Jennifer: Really? Incredible! How about the transportation and living conditions?
Vicki: The cost of transportation(交通) and accommodation(住宿) is also higher. It’s about three times as high as in Shanghai.
Jennifer: Oh, my.
Molly: 香港的物价好高啊!
老师:那你注意到Vicki是怎么对比香港和上海的物价的吗,Molly?
Molly:我学过比较级,所以根据higher可以推测出香港的物价更高,但是句子里有的单词我不太清楚具体是什么意思,比如 twice,three times。
老师:这就是我们今天要学习的新知识啦——倍数的表达法。
Molly:哦~原来是表示几倍的意思呀,Kathy,你给我讲讲吧!
老师:英语中,我们通常使用“基数词+ times”来表达倍数,比如 three times 三倍,four times四倍等。但是一倍和两倍的概念,需使用once和twice来表达。
Molly:哦~我知道了,所以刚刚Vicki说的:
“Prices in Hong Kong are twice higher than those in Shanghai. ”意思就是“香港的物价是上海的两倍”。
老师:倍数的基本表达方式主要有三种:
1. A + 谓语+ 倍数+ 形容词/副词比较级 + than + B
此时表达的概念为“A比B大(长、高、多等)多少倍”
比如:
This rope is twice longer than that one. 这条绳子比那条长两倍。
言下之意就是,这条绳子是那条的三倍长。
Molly:哦~所以刚刚的句子意思是“香港的物价比上海高两倍。”,也就是“香港的物价是上海的三倍。”
老师:Very good!所以在用这种结构表达倍数时,一定要注意和中文区别开,英文倍数要-1哦!
Molly:知道啦,老师。
老师:倍数的第二种表达就是:
2.A + 谓语 + 倍数 + as + 形容词/副词原级 + as + B
此时表达的概念为“A正好是B的多少倍”
比如:
Asia is four times as large as Europe. 亚洲的面积是欧洲的四倍。
This big stone is three times as heavy as that one. 这块大石头的重量是那块的三倍。
Molly:所以对话里“It’s about three times as high as in Shanghai.”的意思就是“它的价格是上海的三倍。”
老师:Bingo!倍数的第三种表达方式是:
3.A + 谓语 + 倍数 + the + 名词 + of + B
此时表达的概念也是“A正好是B的多少倍”,名词通常为面积size,长度length,高度height,宽度width等。
比如:
This street is four times the length of that one. 这条街是那条街的四倍长。
This hill is four times the height of that small one. 这座山的高度是那座小山的四倍。
Molly:我都懂啦,老师。
老师:那你能用刚刚老师讲的这三种倍数表达方式来翻译下面这个句子吗?
他们学校的面积是我们学校的三倍。
Molly:没问题,老师。
Their school is twice larger than ours.
Their school is three times as large as ours.
Their school is three times the size of ours.
老师:Excellent!If you venture nothing , you will have nothing. 不入虎穴,焉得虎子。要想学好这个知识点,同学们课后就得多加练习哦
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