Come on!

They are Gryffindor, Hufflepuff...

Harry Potter has come to Hogwarts.

Ron, Hermione, you'll come with me.

Train's leaving. Go on. Come on, hurry up.

Oh, are you doing magic? Let's see, then.

Parvati Patil said that she wouldn't come out of the girl's bathroom.

Me? Books and cleverness. There are more important things.

If Harry and Ron hadn't come and found me, I'd probably be dead.

...before either of you come up with another clever idea to get us killed.

Come on now, hurry up. Stick your right hand over the broom and say, "Up."

Not on its own. Trolls are really stupid. Probably people playing jokes.

We'll soon find out that some wizarding families are better than others, Potter.

Oh, good God, man, you're not still on about that bloody dragon, are you?

As for monkshood and wolfsbane, they are the same plant, which also goes by the name of aconite.