...note that five points will be taken from your house...

By the way, Harry, Happy Birthday.

Therefore, as punishment for your actions, 50 points will be taken.

Dean was told by Parvati that...

...they will be the first to enter the maze, followed by Mr. Krum...

Now, this one's been hurt bad by something.

Maybe you don't have to do this all by yourself, mate.

But Harry's never traveled by Floo powder before, Mum.

A bezoar is a stone taken from the stomach of a goat and it will save you from most poisons.

Prophecies can only be retrieved by those about whom they are made.

You've got dirt on your nose, by the way. Did you know?

Make way there, please. Let me by, madam. Thank you.

...by a dodge as pathetically dimwitted as an Aging Potion.

All students will be escorted to each lesson by a teacher.

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

As an antidote to your ignorance, and on my desk, by Monday morning...

There was a time detention would find you hanging by your thumbs in the dungeons.

There she was, walking by. You know how I like it when they walk.

"All students will return to their house common rooms by 6:00 every evening."

But if it kills by looking people in the eye, why is it no one's dead?