fifteen

fifteen — number

1. the number that comes after fourteen and before sixteen in a counting sequence;

1.數詞A1
釋義

the number that comes after fourteen and before sixteen in a counting sequence; written as 15 in numerals.

例句

Romi is fifteen years old and just started high school.

age: be + number + years old

The art class has fifteen students this semester.

quantity: number + plural noun

用法筆記

In formal writing, spell out fifteen up to the number ninety-nine. Use numerals (15) for dates, times, and statistics.

常見錯誤

Fiveteen
fifteen
💡learners often add an extra 'e' after the 'v' by analogy with 'five'.
She is fifty years old.' (for age 15)
She is fifteen years old.
💡the -ty endings (fifty = 50) and -teen endings (fifteen = 15) are easily confused by learners.

fifteen — noun