1.This house is big.
=> These houses are big.
2. Is it your pen ? Yes, it is.
=> Are they your pens? Yes, they are.
3. Is this couch small ? No, it isn't.
=> Are these couches small? No, they aren't.
4. That room isn't small.
=> Those rooms aren't small.
5. What 's that ? It 's an eraser.
=> What're those? They're erasers
1. This house is big.
=> These houses are big.
2. Is it your pen? Yes, it is.
=> Are they your pens? Yes, they are.
3. Is this couch small? No, it isn't.
=> Are these couches small? No, they aren't.
4. That room isn't small.
=> Those rooms aren't small.
5. What's that? It's an eraser.
=> What're those? They're erasers.