Grammar Note
作可数名词。a twenty 指一张20美元纸币；复数twenties可指数字20至29的范围（如年龄、年代）。
二十
先理解核心含义，再看它在真实句子里的用法。
二十
the number 20
I paid for the meal with a twenty and got some change.
我用一张二十美元钞票付了餐费，并找了些零钱。
从二十(20)到二十九(29)的数字。
The numbers twenty (20) to twenty-nine (29).
二十
the cardinal number that is the sum of nineteen and one
10-20(位置)。
10-20 (location).
二十美元纸币
a United States bill worth 20 dollars
She asked the cashier to break a twenty into smaller bills.
她让收银员把一张二十美元纸币换成零钱。
He found several twenties in the old wallet.
他在旧钱包里发现了几张二十美元钞票。
Choose the next layer that will help you use twenty with more confidence.
Recommended next
Includes Usage patterns & Collocations
Learn how to use this word with grammar patterns and natural collocations.
Includes Common mistakes & Confusing words
See typical errors learners make and confusing words to avoid.
More ways to explore
Includes Synonyms & Antonyms
Expand your vocabulary with synonyms and antonyms.
Includes Spelling & sound
Explore words with similar spelling endings or sounds.
Includes Word components & Thematic vocabulary
Learn how to build related words using roots, prefixes, and thematic clusters.
Includes Idioms & Cultural references
Discover idioms, slang, and famous pop culture quotes.
Includes Context & register & Memory tip
Analyze the context and learn memory tricks to remember it.
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
Also compare
Use twenty naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
作可数名词。a twenty 指一张20美元纸币；复数twenties可指数字20至29的范围（如年龄、年代）。
Collins 词频等级为 5，建议结合例句记忆，而不是只背中文释义。
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.