Before you _______________ (to cross) the park, you _________________(to come) to a supermarket.

If I ________________(to stay) some more days in your town, I ________________(to call) on you

After I ________________(to finish) school, I __________________(to enter) the University

When he _________________(to return) to Moscow, he __________________(to visit) us.

If I _________________(to see) him, I _________________(to tell) him about their letter.

I ________________(to sing) you this song, if you _______________(to tell) me the words.