18.关于数词的注意点 <例句> In the past thirty years or so, scientists have been able to “see” farther and farther into sky. 在过去三十年左右的时间里,科学家已可以观测到越来越远的太空。 <语法分析> 有关约数的表示法, or so表示“左右”,“大约”可以用about, nearly, some 和 around等表示,用over, more long 可以表示“多余、超过”的意思。用or more和or less 来表示“或......以上”和“或......以下”的意思。基数词常位于another和all后面,such和more的前面,可以谓语last, next和other的前面或后面。 <触类旁通> (1) The pig weights abouts 60 pounds. 这头猪大约60磅重。 语法分析:用about, nearly, some和around等词表示“大约”。 (2) The road is over 3,000 meters long. 这条路有3000多米长。 语法分析:用over, more long可以表示“多于、超过”等意思。 (3) He is less than fifteen years old. 他不到15岁。 语法分析:“少于、不超过”用less than 表示。 (4) This room is twice as big as that one. 这个房间的大小是那个房间的两倍。 语法分析:主语 + 谓语 + 倍数或分数 + as + 形容词 + as 句式表示倍数。 (5) I offer ten times the amount of money that he has borrowed. 我愿出十倍于他借的钱。 语法分析:主语 + 谓语 + 倍数或分数 + as + the size + of 句式表示倍数。 (6) Line A is four times longer than Line B. 线A比线B长4倍。 语法分析:主语 + 谓语 + 倍数或分数 + 形容词或副词比较级 + than句式表示倍数。 <巩固练习> (1) The hall can hold 100 people _____ more. (2) There are 1,000 workers _____ less in our factory. (3) I have four times _____ many books as you. (4) We shall produce twice as much gram _____ we did in last year. (5) The length of this rope is three times the _____ of that one. (6) She has four times _____ money than I have. (7) The grain output is 5 percent higher this year _____ than of last year. (8) The production of iron has been increased _____ five times this year. <参考答案> (1) or (2) or (3) as (4) as (5) length (6) more (7) than (8) by Tags:高中英语,语法,关于,数词,注意 |
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