Where did you go yesterday?

• (you/go) → did you go (Quá khứ đơn)

What is she doing right now?

• (she/do) → is she doing (Hiện tại tiếp diễn)

When did they arrive last night?

• (they/arrive) → did they arrive (Quá khứ đơn)

Why has he not told her the truth yet?

• (he/not/tell) → has he not told (Hiện tại hoàn thành)

How often do you exercise?

• (you/exercise) → do you exercise (Hiện tại đơn)

Who will visit them next weekend?

• (visit) → will visit (Tương lai đơn)

Where will we eat dinner tomorrow?

• (we/eat) → will we eat (Tương lai đơn)

What did she buy at the store yesterday?

• (she/buy) → did she buy (Quá khứ đơn)

How long have they been waiting for the bus now?

• (they/wait) → have they been waiting (Hiện tại hoàn thành tiếp diễn)

When did you finish your project?

• (you/finish) → did you finish (Quá khứ đơn)