N5
Possessive use (Noun omission)
この本はたけしさんのです。
This book is Takeshi-san's.
When a noun has already been mentioned, 「の」 can stand for it, to avoid repeating it: 「その帽子は私のです」 (That hat is mine), 「赤いのをください」 (The red one, please).
It can stand for things: 「車はどっち？」 「白いのです」 (Which car? The white one.)
Be careful with people: saying 「あそこの若いの」 about an elder or a teacher is very rude; say who it is, or use 「あの方」 or 「あちらの方」.
そのペンは誰の？あなたの？
Whose pen is that? Yours?
あのパソコンは君のでしょう？
That computer is yours, isn't it?
その帽子は娘のです。
That hat is my daughter's.
木綿のスカーフは私のです。
The cotton scarf is mine.
「この本は誰の？」「先週来たお客さんの。」
"Whose book is this?" "The customer's who came last week."
この駐車場もあなたの会社のですか。
Is this parking lot your company's too?
これは僕のじゃないです。田中さんのです。
This is not mine. It is Tanaka-san's.
お寿司は日本のがいちばん美味しいですよ。
For sushi, Japan's is the best.
今日きた手紙はタケルの。
The letter that came today is Takeru's.
昨日行った家はヨシのだ。
The house I went to yesterday was Yoshi's.
あそこにある服は私のだけど、それはあなたの。
The clothes over there are mine, but those are yours.
「自転車で行った？誰ので？」「友達ので行ったよ。」
"Did you go by bike? Whose?" "I went on my friend's."
「これは誰のか教えてください。」「それは私のです。」
'Please tell me whose this is.' 'That is mine.'
あの車、あなたのですか。
That car, is it yours?