1、 表示增加、减少和波动：

verb + adverb from 动词+副词adjective + noun from 形容词+名词

动词：increase/jump/rise/decrease/drop/fall/

fluctuate

副词: suddenly/rapidly/dramatically/significantly/sharply/steeply/steadily/gradually/slowly/slightly

形容词：sudden/rapid/dramatic/significant/sharp/steep/steady/gradual/slow/slight

名词：increase/jump/rise/decrease/drop/fall/fluctuation in the number of

例句：a、the number of cars increased rapidly from June to December.

b、There was a very rapid increase between June and December.

(注：不是所有的副词、形容词、名词都能相互搭配，如slow和jump，sharp和fluctuation就不能搭配使用。在这一点上，可以根据词义来进行判断。)

2、 表示变化不大或没有变化

a、the number of … remained steady/stable from … to …

b、there was little/hardlyany/no change in the number of … between … and …

3、表示最大值和最小值

最大值：

a、the figures peaked at 20% in December

b、he figures reached a peak/a high point at 20% in December

c、reach the peak/top/highest point

最小值：

a、the figures bottomed out at 20% in December

b、the figures reached the bottom/a low point at 20% in December

c、reach the bottom/lowest point

占的最多：occupy/make up/take up/account for the largest proportion/percentage of …

占的最少：occupy/make up/take up/account for the smallest proportion/percentage of…

4、描述对比常用套句

a、A had a quarter/half/twice/one third/ as many students as/ as much money as B.

b、A had about the same number/amount of students/money as B.

c、A had something in common with B/ the difference between A and B lies in…

d、A was…., while B was….