Not a computer?
No, it's not. ?

Isn't it? Is it? Have/used to have? Isn't it? No? Won't it?

No? Isn't it? t? It? This is a camera. ?

No? Isn't it? Test my car. ?

no

1be+be? Me? Is it? Not now/in the past/in the past

I'm not hungry.

I am not a programmer.

2be? Really? Will. +be? Really? will not

They are not playing chess.

She is not watching TV.

can,could,may,may,may,must,should? +can,could,may,might,must,should? no

She couldn't help laughing.

The old man can't read or write.