It this his T-shirt?
No, it isn't.
It this her T-shirt?
No, it isn't.
Are they wearing rain boots?
No, they aren't.
Are these her slippers?
Yes, they are.
これは何？と質問して (ask what the object is in English)
What's this?
これらは何？と質問して (ask what the object is in English)
What're these?
Whose T-shirt is this?
It's her T-shirt.
Are these his slippers?
No, they aren't.
彼らは長ズボンを履いていない。（no pants)
They're not wearing pants.
Whose slippers are these?
They're her slippers.
これは何？と質問して (ask what the object is in English)
What's this?
これらは何？と質問して (ask what the object is in English)
What're these？
Are these his socks?
Yes, they are.
What are they wearing? (ジャケット）
They're wearing jackets.
Whose T-shirt is this?
It's his T-shirt.
Is this his T-shirt?
Yes, it is.
What're they wearing? マスク
They're wearing masks.
Whose socks are these?
They're his socks.
Is this her T-shirt?
Yes, it is.
Are these her slippers?
No, they aren't.
What's he wearing?
He's wearing socks.
What's she wearing?
She's wearing a T-shirt.