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Pronoun
| A dependent indefinite pronoun. | One |
| 【Related Expression: の1; の3】 |
(ksa). 私は大きいのを買った・買いました。
I bought a big one.
(ksb). 私は去年買ったのを使った・使いました。
I used the one I bought last year.
| (i)Adjective い informal nonpast の | 高いの | Expensive one |
| (ii)Adjective な stem なの | 丈夫なの | Durable one |
(a). A:どんな車が欲しいですか。 B:小さいのが欲しいです。
A: What kind of car do you want? B: I want a small one.
(b). 友達がワインを飲みたがったので昨日買ったのを出した。
My friend wanted to drink wine, so I served the one I bought yesterday.
1. The indefinite pronoun の is a dependent pronoun; it cannot be used by itself. It must be modified by an adjective or a relative clause.
2. の is used in place of a noun when what it refers to is clear from the context or the situation. Things referred to by の are not necessarily tangible. Example:
【Related Expressions】
The indefinite pronoun の (i.e., の2) is different from the particle の (i.e., の1) and the nominalizer の (i.e., の3). First, [1] shows the difference between の1 and の2. Namely, in [1a] トムの is the omitted form of トムのペン. On the other hand, [1b] is not an omitted form; that is, if a noun is inserted after 黒いの in [1b], the sentence becomes ungrammatical as seen in [1c]. In fact, what [1b] means is [1d], if の 'one' refers to a pen.
[1]
Next, [2] shows the difference between の2 and の3. That is, the meaning of the sentence depends on whether the の in [2] is interpreted as の2 or の3, as shown in the two English translations.
[2]