Present Simple:
He goes to school every day. (+) She meets her friends every week. (+)
He doesn't go to school every day. (-) She doesn't meet her friends every week. (-)
Does he go to school every day? (?) Does she meet her friends every week? (?)
Present Continuous:
I'm doing my homework now. (+) They're playing basketball now. (+)
I'm not doing my homework now. (-) They are not playing basketball now. (-)
Am i doing my homework now? (?) Are they playing basketball now? (?)