Let's try to give off pleasant vibrations.
Filtering, is one of many separation techniques.
After P.E. that day, I wiped perspire off my forehead!
there are many ways to use it, but here is one i can think of off the top of my head: 'when does that milk expire?'
The acrid smell of smoke filled the room after the fire alarm went off.
Evergreen trees do give off oxygen. They give off less oxygen than deciduous trees do in the summer, but they do release oxygen all year.
They where off to explore the world.
I just shrugged it off.
My mind likes to wander to far-off places.
we need to top it off a notch
[The phrase based off is an improper form derived from the phrase "based on."]
The law of gravity is inviolate; you can't turn it off.
The danger with getting sentences off the Internet is that your teacher may find out.
He was off of the medication for nearly a year now.
The phrase 'give off light' means to have a lot of light.
The professor teaching Communications in the Community started off class asking the rhetorical question, "Should we talk to walls?"
The alarm clock buzzed persistantly, despite my attempts to turn it off.
Turn off the computer and go outside and enjoy the fresh air.