four + plural countable noun
four 作定语修饰可数名词时，后面的名词要用复数形式。
She has four cats.
她有四只猫。
比三多一个
比三多一个
being one more than three
She bought four apples at the market.
她在市场买了四个苹果。
用法提示：“four”在这里作形容词，修饰“apples”，表示数量为四。
The class has four new students this term.
这学期班上有四名新同学。
用法提示：“four”作形容词修饰“students”，说明学生的数量是四。
He needs four more minutes to finish the test.
他需要再多四分钟完成测试。
用法提示：“four”修饰“minutes”，表示“四分钟”的数量。
four 作定语修饰可数名词时，后面的名词要用复数形式。
She has four cats.
她有四只猫。
指特定范围内的四个时，用 four of 加限定词再加复数名词，谓语用复数。
Four of the students were absent.
有四名学生缺席。
表示年龄时用“基数词 + years old”作表语，years 必须用复数。
My daughter is four years old.
我女儿四岁了。
grammar · medium
易错句子I have four book.
正确表达I have four books.
英语中数词后接可数名词时，名词必须用复数形式。汉语名词没有复数变化，所以容易漏掉词尾的 -s。
grammar · medium
易错句子This gift is four you.
正确表达This gift is for you.
four 和 for 发音相同，但词义不同。four 是数词“四”，for 是介词“为了、给”。要根据意义选择正确的词。
grammar · medium
易错句子My birthday is on May four.
正确表达My birthday is on May fourth.
英语日期中的“日”要用序数词，而不是基数词。表示“五月四日”应说 May fourth，而不是 May four。
四点钟
The train leaves at four o'clock.
火车四点出发。
四年
He lived in Beijing for four years.
他在北京住了四年。
四季
The four seasons are spring, summer, autumn and winter.
四季是春、夏、秋、冬。
四次
I've been to Japan four times.
我去过日本四次。
四星级酒店
We stayed at a four-star hotel near the airport.
我们住在机场附近的一家四星级酒店。
四叶草
She found a four-leaf clover in the garden.
她在花园里找到了一片四叶草。
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