《2025年金版新学案高中英语选择性必修第一册》

2. decrease n. 减少;减少的量 vi. & vt. 减少
(教材原句)According to scientists, they include volcanic eruptions, asteroids hitting the Earth from space, changes in sea levels, the decrease of the oxygen content of the sea and global warming.
科学家认为原因包括火山爆发、小行星从太空撞击地球、海平面变化、海洋含氧量下降和全球变暖。
归纳
(1)decrease by 减少了
decrease (from...) to (从……)减少到
decrease in 在某方面下降
(2)on the decrease 在下降;在减少
单句语法填空/读后续写之动作描写
①The price of wheat has decreasedby15%.
②There has been a gradual decreaseinthe amount of pollution in the river.
③In this company, the number of employees who are absent from work without permission isonthe decrease.
④望着桌子上的账单,妈妈长舒一口气地说道:“本月我们的电费终于从 800 减少到了 600。”
Looking at the bill on the table, my mother said with a long sigh of relief, “This month our electricity bill finallydecreases from 800 to 600.”

答案： 2.①by ②in ③on ④decreases from 800 to 600