1. Have you had your breakfast yet? Yes, I have.
2.Has he finished his homework yet? No, he hasn't.
3. Have they been to Beijing yet? Yes, they have been to Beijing twice.
4. How long has Marry been in Shanghai? So far he has been in Shanghai for two months.
5. How many English words have you learnt so far? I've already learnt 1600 words so far.