Put the verb in brackets in present simple, present continuous, present perfect or present perfect
continuous:
1) jane (write) a letter to a magazine for 2 hours. she (not finish) it yet.
2) "-what you (do).” – “i (look) for my pen-knife.”
3) nick (play) a computer game for two hours and he is still playing.
4) i already (do) the housework. i can go for a walk now.
5) the concert (start) at 7 p.m. so we (meet) at 6.30 p.m. you (come) with us?
6) sara (think) of moving a new house.
7) jack (wait) for jenny since afternoon. she (not arrive) yet.
8) -” why you (smell) this cheese? ” – “ it (smell) strange"
9) 1 (not/understand) what he is speaking about.
10) i (not/like) jane. she never (know) what she (want).