I am cooking now
She is waiting for Tom
We are meeting Tom tomorrow
I'm not (am not) cooking now
She isn't (is not) waiting for Tom
We aren't (are not) meeting Tom tomorrow
Are you cooking now?
What are you doing at the weekend?
now, at the moment, these days, tomorrow, next week etc.
Words that do not go with "ing" ending
Abstract verbs: be, want, cost, need, care, contain, owe, exist etc.
Possession verbs: own, belong, possess etc.
Emotion Verbs: like, love, hate, dislike, fear, envy etc.;