EXERCISE 3
1) He has been talking on the phone all morning
2) We watched this film yesterday
3) They have been running in the park last week
4) I have been studying without break since 10 am
EXERCISE 4
1) don't have to
2) She has to do it. It's necessary
3) have to
4) You don't have to hurry up. It's early
если возникнут какие то вопросы пиши мне я все объясню
(sphynx queen)