〜冊・〜台・〜匹・〜杯・〜階
counters for books, machines, small animals, cupfuls, floors
Noun + が/を + Number + counter
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Beyond つ, 人, 本 and 枚, a few more counters come up constantly:
- 冊 for books and notebooks: 三冊.
- 台 for cars, bikes and machines: 二台.
- 匹 for small animals: 一匹 (いっぴき), 三匹 (さんびき).
- 杯 for cupfuls and glassfuls: 二杯 (にはい), 三杯 (さんばい).
- 階 for floors: 三階 (さんがい).
Like other counters, they usually follow the noun and its particle: 本を三冊買った.
Sound changes are common: 一, 六, 八 and 十 often double the next consonant (いっぴき, ろっぴき), and 三 often voices it (さんびき, さんばい). When in doubt, つ works for small objects, but not for people, animals or floors.
Examples
本を三冊買いました。
I bought three books.
家に車が二台あります。
We have two cars.
庭に猫が一匹います。
There's a cat in the garden.
コーヒーを二杯飲みました。
I drank two cups of coffee.
トイレは三階にあります。
The toilets are on the third floor.