
一、核心释义
"decrease"这个单词,相信对于经常接触英语的读者来说并不陌生。它指的是数量或程度的减少,简单来说,就是“减少”的意思。在英语写作和口语中,正确理解和运用这个词汇,能够使表达更加精准和地道。
二、用法详解
- 数量减少
"decrease"最直接的用法就是表示数量的减少。例如:
- The population of the city has decreased over the past few years.(这个城市的人口在过去几年里有所减少。)
- 程度降低
除了表示数量的减少,"decrease"还可以用来表示程度的降低。例如:
- The temperature began to decrease as the sun set.(随着太阳落山,气温开始降低。)
- 动词变位
"decrease"的动词变位比较简单,其现在分词为"decreasing",过去式和过去分词均为"decreased"。例如:
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The sales of the product are decreasing.(该产品的销量正在下降。)
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The number of students in the class decreased last semester.(上学期班级的学生人数减少了。)
三、常用搭配
- decrease by
"decrease by"表示减少了多少。例如:
- The population of the city decreased by 10% in the past year.(过去一年,这个城市的人口减少了10%。)
- decrease to
"decrease to"表示减少到多少。例如:
- The price of the product has decreased to $50.(该产品的价格已经降至50美元。)
- decrease from
"decrease from"表示从多少减少到多少。例如:
- The company's revenue decreased from $1 million to $500,000.(公司的收入从100万美元减少到50万美元。)
四、例句展示
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The company's profits have decreased by 20% this year.(公司今年的利润下降了20%。)
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The temperature is decreasing rapidly.(气温正在迅速下降。)
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The population of the city has decreased to 500,000.(这个城市的人口已经减少到50万人。)
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The price of the product has decreased from $100 to $80.(该产品的价格已经从100美元降至80美元。)
五、QA问答
Q:如何区分"decrease"和"reduce"?
A:"decrease"和"reduce"都表示减少,但"decrease"更侧重于数量的减少,而"reduce"则更侧重于程度的降低。例如,可以说"The population decreased",但通常不会说"The population reduced"。
Q:"decrease"和"lessen"有什么区别?
A:"decrease"和"lessen"都表示减少,但"decrease"强调数量的减少,而"lessen"则强调程度的降低。例如,可以说"The number of students decreased",但通常不会说"The number of students lessen"。
Q:"decrease"可以用在哪些语境中?
A:"decrease"可以用在描述人口、价格、温度、收入等数量或程度减少的语境中。