1.They have been married for 10 years.
2.Andrew has learned since four o'clock.
3.I have lost my wallet.
4.The guests have just arrived.
1.I haven't seen him for 2 days!
2.I haven't knew this man since 2 days ago.
3.She hasn't written a book.
4.They have not been here for a long time.
5.He hasn't gone to the match.
1.Have you ever go to a concert?
2.How long have you been waiting?
3.Why haven't you visited me since Friday?
4.Have you had your breakfast yet?
5.Have you ever visited London?
