Ответ:

we have a family pet.

we don't have a family pet.

I am reading a good book at the moment

I am not reading a good book at the moment

my parents speak English

my parents don't speak ENGLISH

I'm wearing my favourite shoes today

I'm not wearing my favourite shoes today

my best friend likes shopping

my best friend doesn't like shopping

I play the guitar

I don't play the guitar

it is raining

it isn't raining.