上升動詞類： increase, go up, rise up, grow up, jump up, surge, shoot up, keep an upward tendency

　　下降動詞類： decrease, go down, decline, fall down, drop, sink, dip, keep a downward tendency

　　波動動詞類： fluctuate

　　持平動詞類： remain the same, stabilize, remain stable, remain constant

　　修飾動詞的副詞： slightly 輕微地， slowly 緩慢地， gradually 逐漸地， steadily 穩定地， rapidly 迅速地， moderately 溫和地， 輕微地， significantly 明顯地， sharply 明顯地， dramatically急劇地， drastically 急劇地

　　上升名詞類： increase, rise, growth, jump, surge

　　下降名詞類： decrease, decline, fall, reduction, drop

　　波動名詞類： fluctuation

　　修飾名詞的形容詞： slight, slow, gradual, steady, rapid, moderate, significant, sharp, dramatic, drastic

　　2、極值類詞匯和表達

　　最高點： reach the peak/top/highest point

　　Increase to the peak/top/highest point(所有上升類的動詞都可以替換掉increase)

　　最低點： reach the bottom/lowest point

　　drop to the bottom/lowest point(所有下降類的動詞都可以替換掉drop)

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

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

　　3、倍數的表達方式

　　Double 是兩倍/大一倍

　　Increase/decrease three times 增長/減少了三倍

　　4、大約的表達方式

　　About/around + 數字

　　數字 + or so

　　Approximately + 數字

　　5、常用的小作文的趨勢句式表達

　　句式一： 變化主體/圖畫中主體+趨勢動詞+副詞+時間區間

　　Eg: The number of aged people over 65 increased significantly from 1940-2000.

　　The number of aged people over 65 dropped slightly from 1960-1980.

　　The number of aged people over 65 fluctuated between 1 million and 1.2 million from 1940-1950.

　　The number of aged people over 65 remained stable from 1930-1940.

　　句式二： There be + 形容詞 + 表示趨勢的名詞 + in+ 變化的主體+ 時間區間

　　Eg: There was an significant increase in the number of aged people over 65 from 1940-2000.

　　There was a slight decline in the number of aged people over 65 from 1960-1980.

　　There was a fluctuation between 1 million and 1.2 million from 1940-1950.