Exercise 3: Put the verbs into the suitable form, the present perfect or the present perfect progressive. 1. A: How long __have you studied______ (you/study) English? How long + HTHT : Bao lâu? B: I __have learned______ (learn) English since I was twelve. HTHT since QKĐ 2. A: Are you waiting for someone? B: Yes, I __have been waiting_____ (wait) for two hours, but my friend __have been waiting______ (not come) yet. 3. A: I __have lost_____ (lose) my address book. __Have you seen ______ (you/see) it anywhere? B: Yes. I ___have just seen_____ (just/see) it on the bookself. 4. A: You look tired. __Have you been working______ (you/work) so hard? B: Yes. I __have been studying________ (study) for four hours and probably won’t finish until midnight. 5. A: __Have you seen_______ (you/see) Mark recently? B: No, I ___haven’t seen_____ (not/see) him since Christmas, I wonder where he ___has lived_______ (live) since then. 6. A: I feel really tired. B: It’s because you ___have done_____ (do) too much. A: Well, at least I __have finish______ (finish) that report now, and I can relax. 7. A: Someone ___has left______ (leave) the ladder outside, look. B: I expect that’s Mike. He ___has been cleaning_____ (clean) the windows. I don’t think he __has finished_____ (finish) yet. 8. A: You’ve got mud on your shoes. B: It’s all right, I’ll take them off. I __have been working______ (work) in the garden. A: Yes, it looks a lot tidier. Well done. You ___have done____ (do) a good job. 9. A: I __have heard______ (hear) that you and Harriet are building a garage. How long _have you been doing _____ (you/do) that? B: Oh, for about a month now. We ___have been doing ____ (do) about half of it. 10. A: You’re still reading that book, aren’t you? How long __have you been reading _____ (you/read) it? B: I __have been reading______ (read) it for three days, but I ___haven’t finished ______ (not/finish) it yet. 11. A: How long ___have you known_____ (you/know) Jane? B: We ___have known______ (know) each other for over ten years. 12. A: __Has John always lived_______ (John/always/live) in London? B: No, he ___he has lived (_______ (live) in London for the last few years. mn giải thích từng câu giúp mình ạ ( mình đg cần gấp ạ )