2) a: do you usually go to the gym?
B: yes, I do
A: did you go to the gym yesterday?
B: no, I didn't. I stayed at home
3) a: do you usually walk your dog in the afternoon?
B: yes, I do
A: did you walk your dog yesterday afternoon?
B: no, I didn't. I had to work late
4) a: do you usually drive to work?
B: yes, I do
A: have you driven to work this morning?
B: no, I haven't. I caught the bus