If Harry ... (not pass) his exam, he ... (not study) in Hogwarts any longer.
doesn't pass, won't study
Professor Snape ... (talk) to Dumbledore if Harry ... (miss) his lesson.
will talk, misses
Hermione ... (fight) the troll alone if nobody ... (help) her.
will fight, helps
if Hagrid ... (have) a pet, it ... (be) a small dragon.
has, will be
If Ron ... (get) an angry letter from his mum, he ... (be) sad.
gets, will be
If Harry ... (not study) well, he ... (not play) quidditch
doesn't study, won't play
If Ron ... (eat) all these chicken legs, he ... (have) a stomach ache.
eats, will have
Gryffindor ... (win) the game if Harry ... (catch) snitch.
will win, catches
You ... (die) if you ... (drink) this potion.
will die, drink
Hermione ... (not be) the best student if she ... (not read) so many books.
won't be, doesn't read
