Present Simple vs Present Continuous & Past Simple on the board !
1 - What are you doing now? (Present Continuous)
I am walking to school now. / Are you driving to school now? / No, I'm not.
2 - What do you do every day? (Present Simple)
I walk to school every day. / Do you drive to school? / No, I don't.
3 - What did you do yesterday? (Past Simple)
I walked to school yesterday. / Did you drive yesterday? / No, I didn't.