これは誰の

whose ... is this

→ 此れ
phrase Uncommon #13,036
whose ... is this の marks possession and is usually followed by the thing being asked about, such as a bag or car.
JA: これは誰の傘ですか?
EN: Whose umbrella is this?

これは誰の車かしら。

I wonder whose car this is.

これは誰の食い物ですか。

Whose food is this?

「これは誰のイスですか」「私のものです」

“Whose chair is this?” “It’s mine.”

これは誰の机ですか?

Whose desk is this?

これは誰の鉛筆ですか。

Whose pencil is this?

これは誰の傘ですか。

Whose umbrella is this?

これは誰の自転車ですか。

Whose bicycle is this?

これは誰の鞄ですか。

Whose bag is this?

これは誰のカメラ?

Whose camera is this?

これは誰の辞書ですか。

Whose dictionary is this?

これは誰のはさみだろう。

I wonder whose scissors these are.

これは誰のメガネかなぁ?

I wonder whose glasses these are.

これは誰の自動車ですか。

Whose car is this?

これは誰の靴ですか?

Whose shoes are these?

これは誰の教科書ですか。

Whose textbook is this?