1)If he works hard, he will pass.
3)If we leave you on Saturnday, we'll see you on Sunday.
4)If they catch the 14:30 plane, they will arrive.
5)If there's nothing intersting on TV, we watch a movie.
6)If I give you the keys, i'll post them on you.
7)If he doesn't play well, he will lose the match.