1) We are gathering mushrooms in the forest.
2) The boys are not riding the horses now.
3) Is your sister having breakfast now?
4) They are whitewashing the trees in the garden.
5) Are you waiting for me?
6) Roger is nof having lunch now.
7) Our teacher is speaking to them now.
8) Is Vicky vacuuming the carpet in the living-room?
9) Helen is not making coffee for me.
10) My friend and me are going to the cinema.
11)The children are learning a song for the concert.
12) His Brother is not looking for work now.
13)Are the garlands hanging you in the hall?
14) My furniture is dusting in the sister bedroom now.
15)Everybody is enjoying the party.
Вот, всё. Приношу извинения, если что-то будет сделано не правильно. Я думаю, что этот вариант правильный)