You‟d better take a sweater with you know if / in case it gets cold tonight.
Do what you like provided / unless you don‟t make any noise.
I‟m not going to worry unless / as long as she hasn‟t called by midnight.
2. Use the verbs in right forms.
Mr.Day: Can‟t you stop playing that computer? You‟re making an awful noise.
Adam: Well, if … I don‟t practice … (I/not practice), I won‟t pass my exam.
Mr.Day: But why at night? It‟s half past twelve. If (1) …… (you/play) it in the daytime, (2) … … (I / not / hear) you because I‟d be at work. If (3) … … (you / tell) me about this trumpet when you first came here, (4) … … (I / not / let) you have the room. I‟m afraid it‟s becoming a nuisance. If (5) … …. (you / not / play) so loud, (6) … …. (it / not / be) so bad.
Adam: I‟m sorry, but you can‟t play a trumpet quietly.
Mr.Day: if (7) … … (I / realize) a year ago what you were going to do, then (8) … … (I / throw) you out long ago. If (9) … … (you / go) on making this noise at night, (9) … …. (you / go) on making this noise at night, (10) … … (I / have) to complain to your college.
3 Underline the right verb in each sentence.
If the machine stops / will stop, you press / will press this button.
If you help / helped me with this exercise, I will / would do the same for you one day.
According to the timetable, if the train leaves / left on time, we will / would arrive on time.