If you've been paying attention in class, then you've probably heard some of these sayings before. Of course, their actual meanings depend on the professor, but here are the most common ones.

1. "Are there any questions?"

"You all look confused, and it's very concerning."

We've all been in that class where a majority of people did not understand what the professor said in the last 20-30 minutes. Then, nobody raises their hand because they don't want to feel like the idiot in the class when in reality they're actually the class's savior. Remember, the stupidest question is the one you don't ask.

2. "Alright, pencils down."

"You have ten seconds until the TA swipes your test and grades whatever scribble you just added on there."

Let's face it. Certain exams are just hard, and you're more than likely to take advantage of every single minute of the testing period. Even then, you're probably not going to finish because something isn't right and you're well aware of it too. So you're constantly checking the question over and over and over until you find out what's wrong. The time to make that correction is when the tests are being collected.

3. "Attendance isn't mandatory, but coming to class will help."

"You better show up to class or else you'll fail."

Seriously, not having mandatory attendance is a clear sign that you should really come to class. That means the professor will go over material that you may not find in the slides or the textbook, and next thing you know, all that material is on the pop-quiz.

4. "The exam will be cumulative."

"I hope you haven't thrown away all your materials from the beginning of the semester or else you'll fail."

How else can you possibly study for a cumulative exam? If you're lucky, your professor or TA will have a review session for the exam. Even then, it can be pretty damn useless if nobody comes in with any questions. So, it would be a good idea to start developing a hoarding problem with past notes and tests.

5. "Don't worry, you're going to do fine."

Now, this is one of the rare circumstances that there's no actual meaning. Chances are that you'll only hear this when you're personally talking to your professor whether it be during office hours or email. By then, the professor will know your commitment to their class, and as long as you uphold that commitment, everything will actually be alright. Professors don't want to see their students fail.