英语中倍数的表达法问题英语倍数是个难点,该怎样掌握

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倍数表达法倍数中的“两倍”用twice或double表示；三倍或三倍以上用“基数词+times”构成 ① A + be + 倍数 + 形容词比较级 + than + B The stick is three times longer than that one.这根棍子是那根的三倍长.Our new school is twice bigger than the old one.我们的新学校是老学校的两倍大.② A + be +倍数 + as +形容词原级 + as + B The stick is three times as long as that one.这根棍子是那根的三倍长.The hotel has twice as many rooms as that one.这家宾馆的房间数是那家的两倍.③ A + be + 倍数 + the + 名词 + of + B 这类名词常见的有size（大小）,length（长度）,weight（重量）,height（高度）,amount（数量）,price（价格）,speed（速度）,width（宽度）,depth（深度）等.The stick is three times the length of that one.这根棍子是那根的三倍长.You are twice her age.你的年龄是她的两倍.In this area the grain output is five time that of before this year.这个地区今年的粮食产量是以往的五倍.④ 其他表达 I’m double your age.我的年龄是你的两倍.I have as many books again as you.我的书是你的两倍