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三种必用句式a) There be + 变化(名词) + in + 被描述对象(纵坐
标) There was an increase in global water use.
b) 描述对象(常为纵坐标) + 变化(动词) in 时间或地点
The water use rises dramatically in 1970/Brazil. c) 横坐标作主语 ( 一般为时间或者地点 ) + 经历 + 变化
(形容词 / 名词) + in+ 描述对象(纵坐标)
* 表示经历 : see / witness / experience / undergo
1900 experienced an upward trend in water use in Brazil.
Brazil experienced an upward trend in water use in 1900.
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