ninety

ninety — 名詞

1. the number that comes after eighty-nine and before ninety-one, used when countin

1.名詞A1
釋義

九十

數字90，用於計數

the number that comes after eighty-nine and before ninety-one, used when counting or saying how many of something there are

例句

Kevin saved ninety dollars from his summer job to buy a new bicycle.

Kevin 用暑假打工存的九十美元買了一輛新腳踏車。

quantity: ninety + countable noun (dollars)

The temperature outside reached ninety degrees by noon today.

今天中午氣溫高達華氏九十度。

measurement: ninety degrees (temperature)

文法句型

ninety + noun (plural)

ninety out of + number

用法筆記

When writing compound numbers from ninety-one to ninety-nine as words, use a hyphen between 'ninety' and the unit (e.g., ninety-seven, ninety-two).

常見錯誤

❌I am ninety years.
✅I am ninety years old.
💡When talking about age, you need 'years old' or 'years of age' after the number.
❌Ninety peoples came to the party.
✅Ninety people came to the party.
💡'People' is already plural; do not add an 's'.

2. the written symbol or name '90' treated as a thing — for example, a mark on a pa

2.名詞A1
釋義

數字九十

九十這個書寫符號

the written symbol or name '90' treated as a thing — for example, a mark on a page or the name of a number in a maths problem

例句

The child drew a large ninety on the paper with a bright blue crayon.

那個小孩用亮藍色的蠟筆在紙上畫了一個大大的「九十」。

countable: a ninety (physical symbol)

If you turn a ninety upside down, it looks a lot like the number six.

如果把「九十」倒過來看，它長得很像數字六。

文法句型

a ninety

the ninety

a + number + ninety

用法筆記

Unlike the cardinal sense (sense 1), this noun sense treats 'ninety' as a countable object — you can say 'a ninety' or 'the ninety'. It refers to the numeral as a physical or written thing rather than a quantity.

3. the set of whole numbers from ninety up to ninety-nine, used especially when des

3.名詞A2
釋義

九十多

從90到99的範圍

the set of whole numbers from ninety up to ninety-nine, used especially when describing a person's age, the temperature, a score, or a period of ten years in a century

例句

Ayesha's grandmother is in her nineties and still knits sweaters for the family every winter.

Ayesha 的奶奶已經九十多歲了，每年冬天還會為家人織毛衣。

age range: in one's nineties

Temperatures in the nineties are common in Taipei during July and August.

臺北七、八月常見華氏九十幾度的高溫。

temperature range: in the nineties

文法句型

in the nineties

in one's nineties

the nineties (as a decade)

用法筆記

This sense always uses the plural form 'nineties'. The meaning changes by context: 'in one's nineties' = age 90–99; 'in the nineties' = temperature 90–99°F or the 1990s decade.

常見錯誤

❌My grandmother is in her ninety.
✅My grandmother is in her nineties.
💡Use the plural form 'nineties' when referring to an age range or temperature range.