a In Present Simple tense, how do you go? In Present Continuous tense, how are you going? In Past Simple tense, how did you go?
b In Present Simple tense, what kind of car is it? In Present Continuous tense, what kind of car are you driving? In Past Simple tense, what kind of car was it?
c In Present Simple tense, what is she watching? In Present Continuous tense, what is she currently watching? In Past Simple tense, what did she watch?
d In Present Simple tense, where did you see? In Present Continuous tense, where are you seeing? In Past Simple tense, where did you see?
e In Present Perfect tense, why has he left the party? In Present Simple tense, why does he leave the party? In Past Simple tense, why did he leave the party?
f In Present Simple tense, where are you going on holiday? In Present Continuous tense, where are you currently going on holiday? In Past Simple tense, where did you go on holiday?
g In Present Simple tense, why doesn't he work? In Present Continuous tense, why isn't he working?