1.Water (boil – boils – boiled – boiling) at 100 degrees centigrade.
2.I always (catch – catching – caught – catches) the 5 o'clock bus.
3.He often (go – went – goes – going) to bed late
4.Look! A man (runs – run – running – is running) after the tram.
5.She (is playing – play – plays – playing) the piano at the moment..
6.Every week, he (pays – pay – is paying – paying) us a visit
7.I (am speaking – speak – speaks – speaking) now.
8.I see a man outside. He (looks – looking – is looking – look) at me.
9.Cows (giving – give – gives – are giving) us milk.
10.I feel terrible. I think I (will – going to – am going to) be sick.
11.That bag looks very heavy. I (will – am going to – going) help you with it.
12.Thanks for the money. I (will – going to – am going to) give it back. I promise.
13.I can't meet you tomorrow. I (will – going to – am going to ) play tennis.
14.I forget to phone Ali I (will – going to – am going to) phone him now.
15.The plane didn't take (on – of – off ) because of the rain.
16.The teacher told the students to take (down – out – on ) what he wrote on the board.
17.You look sad so I think I should take you ( down – off – out ).
18.Ahmed always takes (on – in - over ) the difficult job in the factory.