Word · Frequency #1350
forty
四十
核心释义
the number 40
- 1.
四十
the cardinal number that is the product of ten and four
用法In use
There are forty students in our class.
用法提示:forty 在这里作名词,表示数字四十,指学生的数量。
She saved forty dollars last week.
用法提示:forty 作名词,指金额四十美元。
The recipe calls for forty grams of sugar.
用法提示:forty 作名词,表示四十克这一数量。
forty + plural noun
表示数量,后面接可数名词的复数形式。
The library has forty new computers.
图书馆有四十台新电脑。
forty of + the/these/those/代词
表示整体中的四十个,of 后面要接限定词或代词。
Forty of the students passed the exam.
这些学生中有四十人通过了考试。
a forty- + singular noun(复合定语)
作定语构成复合词时,中间加连字符,后面的名词用单数。
It's only a forty-minute drive to the airport.
去机场只需四十分钟车程。
常见错误Common mistakes
易错句子There are fourty students in my class.正确表达There are forty students in my class.
拼写错误:forty 虽与 four 同源,但拼写时不保留 u,写作 forty;可对比 four→fourteen 保留 u,而 four→forty 不保留。同理 fifty、sixty 也不含 u。
易错句子My uncle is in his forty.正确表达My uncle is in his forties.
表示“四十多岁”这一年龄段时,英语用固定复数形式 in one's forties,不能像汉语那样直接说“他的四十”。因为这里指 40 到 49 岁之间的十年区间,需用复数。
易错句子He is a forty-years-old man.正确表达He is a forty-year-old man.
数词加名词构成的复合形容词作前置定语时,名词不用复数且各词间加连字符,故写 forty-year-old;只有在作表语时才说 He is forty years old,此时 year 用复数且不加连字符。
相关词与表达Connections
搭配Collocations
- forty winks
- 小睡,打个盹
- He grabbed forty winks on the train.他在火车上打了个盹。
- forty-hour week
- 每周四十小时的工作周
- Most full-time staff here work a forty-hour week.这里大多数全职员工每周工作四十小时。
- forty years old
- 四十岁
- My father is forty years old this year.我父亲今年四十岁。
- forty percent
- 百分之四十
- Forty percent of the students passed the exam.百分之四十的学生通过了考试。
- in one's forties
- 在四十多岁时
学习提示Learner notes
用法优先级Usage priority
Collins 词频等级为 5,建议结合例句记忆,而不是只背中文释义。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.