Is Billy in the bedroom? No, he isn't. / No, she isn't.
No, he isn't.
Are mum and dad in the kitchen? No, they aren't. / No, they isn't.
No, they aren't.
Are grandma and grandpa in the bathroom? Yes, she is. / Yes, they are.
Yes, they are.
Are Billy and Rosy in the kitchen? Yes, they are. / Yes, he is.
Yes, they are.
