zamień zdania twierdzące na zdania przeczące

Mark is working now
I am thinking about buying a car
We are having a wonderful time
Jane is starting her karate course on Friday
My parents are going on holiday tomorrow
My cat is sleeping under the table
Tom is listening to music now
The boys are playing football in the garden
It is raining
Dad is watching the news on TV
We are going skiing next week
The students are studying for the test