在雅思写作中,我们经常要表达“A是B的n倍。”也就是说,我们要学会比较数据,今天,小编就教大家如何正确运用形容词比较级和百分比对比、描述数据。同时,还为大家总结了经常容易混淆的时间介词。
一、用“平级”或“比较级”表达倍数
表达倍数时,既可以用“平级”,也可以用“比较级”。
如:A楼的高度是B楼的三倍(A楼比B楼高两倍)。
Building A is three times as tall as Building B. (平级)
Building A is three times taller than Building B. (比较级)
在倍数比较的句子中,常见的错误之一,是形容词与其所修饰的名词不搭配。
例如:
The population of China is five times as big as that of Pakistan. √
The population of China is five times as many as that of Pakistan. ×
在汉语里,可以用“多”和“少”来形容人口,于是很多人会用as many as。而句中的主语是population, 只可以用large/big/small来形容。
二、百分数的表达percent or percentage?
Percent : it is used to express proportions out of a hundred. Percent is always used with a number.
2 percent = 2%
percent = per centum
数词+percent+of+sth:后面谓语的单复数以percent后面跟接的主语(sth)为主
例如:
20 percent of the apples are eaten. (这里是复数的可数名词,所以用复数。)
20 percent of the water is drunk.(这里是不可数名词,所以用单数。)
Percentage: portion or amount of something
The percentage of +sth+ is:注意这里不管后面跟的是什