Rewrite in negative. Do not use contracted forms such as don't or doesn't. Use full forms do not and does not. Do not forget to put "." fullstop at the end of each sentence.
I have a cat.
She eats a lot of ice-cream in summer.
They speak very loudly.
I wait for my friend.
He looks through that window every day.
We write a lot at school.
He lives in Riga.