Explain why it is so. (тема урока The Present Perfect Tense) Объясни следующее.  Example: - There are no pies on the plate. John (eat).- John has eaten them.1) - Their house is now yellow!- Yes, they (paint) ... .2) - He knows ...

Explain why it is so. (тема урока The Present Perfect Tense) Объясни следующее.  Example: - There are no pies on the plate. John (eat). - John has eaten them. 1) - Their house is now yellow! - Yes, they (paint) ... . 2) - He knows everything about Moscow. - I think he does. He (be) ... there many times. 3) - John, your car looks so clean! It should be! I (wash) ... . 4) - Your grandparents are tired. Yes, they (come) back from the shops. 5) - Does Harry know about it? - Yes, I (give) ... him a call. 6) - Is the book interesting? - I don't know yet. I just (begin) ... reading it. 7) - Why is Jason in hospital? - He (fall) ... off his bike. 8) - Roy knows nothing about our meeting. - Sorry. I (not, speak) ... to him yet.