1) What time (when) do we usually have lunch?
What do we usually have at 12 o'clock?
Do we usually have lunch or dinner at 12 o'clock?
2) Who went shopping yesterday?
What did Jane and Jess do yesterday?
Jane and Jess went shopping yesterday, didn't they?
3) When will I go to the swimming pool?
Will I go to the swimming pool or go shoppinng tomorrow?
Will I go to the swimming pool tomorrow?