Word · Frequency #1003
thirty
三十
ten more than twenty; 30
- 1.
being ten more than twenty
比二十多十的
比二十多十的
In use
She waited for thirty minutes before the bus arrived.
There are thirty students in my English class.
He saved thirty dollars by buying the ticket online.
thirty + [noun]
当后面跟可数名词时，名词用复数形式。
She bought thirty apples.
她买了三十个苹果。
be thirty
表示年龄时，'years old'可以省略，但通常用完整形式。
He is thirty years old.
他三十岁。
Common mistakes
I have thirteen students in my class.I have thirty students in my class.
因发音相似，学习者常将"thirty"（三十）误说成"thirteen"（十三）。注意元音长度和末尾/n/音的差异，三十的英文是/ˈθɜːti/，而十三是/ˌθɜːˈtiːn/。
He is thirty years.He is thirty years old.
在英语中表达年龄时，数词后需跟"years old"（岁）作表语补足语，直接说"years"是受中文“他三十岁”直译的影响。
Connections
Collocations
- thirty years old
- 三十岁
- She is thirty years old.她三十岁。
- thirty minutes
- 三十分钟
- The bus comes every thirty minutes.公交车每三十分钟来一趟。
- thirty days
- 三十天
- The ticket is valid for thirty days.这张票三十天内有效。
- thirty people
- 三十个人
- About thirty people attended the meeting.大约三十个人参加了会议。
- thirty kilometers
- 三十公里
- We walked thirty kilometers today.我们今天走了三十公里。
- thirty percent
- 百分之三十
Learner notes
Memory Tip
想想 thirty 开头 thir 很像 three，三个十就是三十。
Context & Register
语域：neutral 常见场景：日常对话、书面表达 thirty 作形容词表示“三十的”，属于中性用法，正式与非正式场合都比较常见，多用于描述数量、年龄或年份。
Pronunciation & Spelling
真正与 thirty 押韵（/ˈθɜːti/）的词有 dirty /ˈdɜːti/ 和 flirty /ˈflɜːti/，它们重读元音 /ɜː/ 和结尾 /ti/ 相同。注意拼写相似的 thirsty /ˈθɜːsti/、thirteen /ˌθɜːˈtiːn/、forty /ˈfɔːti/、third /θɜːd/ 发音并不相同，不要从拼写类推。
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。
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.