Пригадайте часові форми дієслів та виконайте граматичну вправу письмово. I (to be playing the piano) when she came in.
Mary and Tom (to attend) this concert already.
My family (to be fond of) both jazz and folk music.
Robert (to go to) the rock festival next summer.
1.was playing
2.have attended
3.is fond of
4.is going to