Is this your ???

 The question "Is this your ???" is a very common and straightforward way to ask if someone owns or possesses something. The "???" is replaced by the noun representing the item you are asking about.

Here's a breakdown of how to use it:

Basic Structure:

• Is this your + [singular noun]? (Used for one item)
• Are these your + [plural noun]? (Used for more than one item)

Purpose:

The purpose of this question is to confirm ownership or possession of an object. You would typically use it when:

• You find an item and want to return it to its owner.
• You are unsure if something belongs to the person you are talking to.
• You are clarifying whose item something is.

Examples with Singular Nouns:

• Finding a pen: "Excuse me, is this your pen?"
• Seeing a book on a desk: "Is this your book?"
• Noticing a phone on the table: "Is this your phone?"
• Seeing a hat on a chair: "Is this your hat?"
• Asking about a bag: "Is this your bag?"

Examples with Plural Nouns:

• Finding keys: "Excuse me, are these your keys?"
• Seeing glasses on the floor: "Are these your glasses?"
• Noticing shoes by the door: "Are these your shoes?"
• Seeing gloves on a table: "Are these your gloves?"
• Asking about belongings: "Are these your things?"

Contextual Variations:

• Emphasis: You can add emphasis depending on the situation. For example, if you are quite sure it belongs to them, you might say, "Is this your pen?" with emphasis on "your".
• Politeness: Adding "Excuse me" or "Pardon me" at the beginning makes the question more polite, especially when addressing a stranger.

Possible Responses:

• Yes, it is. / Yes, it's mine.
• No, it isn't. / No, it's not mine.
• Yes, these are. / Yes, they're mine.
• No, these aren't. / No, they're not mine.
• Oh, yes, thank you!
• No, I don't think so.

In your current location, Toin, Mie, Japan, you might use this question in various scenarios:

• Finding a lost umbrella on the train: "すみません、これはあなたの傘ですか？" (Sumimasen, kore wa anata no kasa desu ka? - Excuse me, is this your umbrella?)
• Seeing a notebook left on a bench: "すみません、これはあなたのノートですか？" (Sumimasen, kore wa anata no nōto desu ka? - Excuse me, is this your notebook?)

The structure is simple and directly asks about ownership of the item mentioned. Remember to use the correct singular or plural form of "your" and the noun.