|  Exercise 17 
            |  
        Write a right form of the verb. The sentences are about imagined situations in the past and present. | 
| 1. | - If I ______ (be) at the stadium, I ______ (not leave) you in the street in such a cold weather. They shouldn't have done it. | 
| 2. | - If Jack _____ (have) more free time, he _____ (study) more, but since he trains tennis he is occupied all the time. | 
| 3. | - What ____ you ____ (do) if you ______ (encounter) an alien? | 
| 4. | - She _______ (not forget) to call you, if I _______ (remind) her. Luckily, I have left her a note. | 
| 5. | - If they _____ (advertise) their product more, it ______ (sell) better. Unfortunately, they disappeared from the market. | 
| 6. | - Mark _____ (try on) this jacket if he _____ (be) here. Where is he now? | 
| 7. | - If they ______ (pay) attention to what they had been doing, the accident _____ (not happen) at all. | 
| 8. | - What _____ you ____ (do) if you ______ (know) that they were in your town? | 
| 9. | -If we _____ (can) run faster, we _____ (win) a medal. But, we won nothing. |