1) This man is a writer. He writes books. He has been writing books since he was a young man. He has already written eight books.
2) What have you been doing here since morning?
3) Lena is a very good girl. She always helps her mother around the house. Today she's been helping her mother since morning. They have already washed the floor and dusted the furniture. Now they're cooking dinner together.
(дальше вставляла только необходимые формы глаголов с местоимениями)
4) is running; has been running.
5) are they doing; they are working; have been working.
6) is he; he is; is playing; have been playing.
7) live; have been living.
8) works; has been working.
9) have you found; I'm still looking; I have been loooking for it for two hours but haven't found it yet.
10) you've been playing.
11) you've been sleeping.
12) I've been waiting; haven't received it yet.
13) has been doing; hasn't done half of it yet.
14) I've been waiting.
15) are you doing; I am reading; I've been reading; I've already read.
16) as I haven't heard it.
17) just received; haven't received any letters from my parents yet.
18) is fine; has been shining.
19) wind up.
20) are you doing; I've been waiting.
21) are your gloves; I have put.
22) have been staying; have been staying; I am having; I am taking; I have already seen; I have just taken; rises; provides.
23) I'm going to; I am sure it is starving; has already fed.