twenty + plural countable noun
twenty 后接可数名词时,名词用复数形式,twenty 本身不变。
The room can seat twenty people.
这个房间能坐二十个人。
基数20,位于十九之后,二十一之前。;二十个
the number 20
基数20,位于十九之后,二十一之前。
The cardinal number 20, occurring after nineteen and before twenty-one.
There are twenty students in our class.
我们班有二十名学生。
用法提示:twenty 作数词,修饰名词 students,表示数量二十。
My sister is twenty years old.
我姐姐二十岁。
用法提示:twenty 作数词,与 years old 搭配表示年龄二十。
I need twenty minutes to finish this task.
我需要二十分钟完成这项任务。
用法提示:twenty 作数词,修饰 minutes,表示时长二十。
twenty 后接可数名词时,名词用复数形式,twenty 本身不变。
The room can seat twenty people.
这个房间能坐二十个人。
表示年龄时用 “twenty years old”,years 必须为复数。
Her son is twenty years old.
她儿子二十岁。
twenties 表示 20 到 29 岁的年龄段,前面用物主代词或所有格。
She wrote her first novel in her twenties.
她在二十多岁时写了第一部小说。
grammar · medium
易错句子My sister is twenty years.
正确表达My sister is twenty years old.
“twenty years”单独出现表示“二十年”这一时间长度;表示年龄时必须说 twenty years old,或直接用 be twenty。中文“二十岁”里的“岁”对应英语的 years old,不能省略。
grammar · medium
易错句子Today is my twenty birthday.
正确表达Today is my twentieth birthday.
修饰 birthday 表示“第二十个”要用序数词 twentieth;twenty 是基数词,只表示数量“二十”,不能充当序数词。中文“第二十个”里的“第”在英语中必须用 -th 序数形式体现。
grammar · medium
易错句子My grandfather is in his twenty.
正确表达My grandfather is in his twenties.
表示“二十多岁”这一年龄段要用复数 twenties,固定搭配为 in one's twenties;单数 twenty 只指数字二十。中文“二十多岁”带“多”,正对应英语的复数形式。
百分之二十
Twenty percent of the students were absent.
百分之二十的学生缺席了。
二十岁
She is twenty years old.
她二十岁。
二十个问题(一种问答游戏)
Let's play twenty questions.
我们来玩二十个问题吧。
完美视力;标准视力
He has twenty-twenty vision.
他的视力完美无缺。
二十多岁
She is a twenty-something entrepreneur.
她是一位二十多岁的企业家。
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