1.My father [is] a worker, he [is] at work.
2.What language are you [ studying] now?
3.Tell me, what are they [ talking] about?
4.She normally [does not have] breakfast.
5.What has happened? Why has he stopped?
6.Marie is busy. She [is knitting] a sweater for her dog.
7.Jimmy, who finally [has found] a new job, [is giving] a big party.
8.She [has been doing] her homework since morning.
9.I [have been working] already at my essay for 4 hours.
10. I [have known] her since my childhood.
11. The boy’s birthday is on December 31, that's why he gets a lot of gifts.
12. At the moment I am reading Gogol.
13. She still has not called me.
14. While mom is cooking, I clean the room.
15. The plane arrives at the airport at 22:00.
16. I have come back home.
17. My friend does not wash his hands before eating.
18. They have been catching fish for 6 hours.
19. Next weekend we are going to the country.