Carlos usually ______(sit) in the main office, but today he ___________ (work) at home
Carlos usually sits in the main office, he today he is working at home.
What time_________ (you/ have to) leave home to get to work.
What time do you have to leave home to get to work.
Look at the woman over there. Why ____ (she/ sit) at John's desk?
Look at the woman over there. Why is she sitting at John's desk?