Englishfor English speakers
before
Preposition
—
If mathx/math happens before mathy/math, mathx/math happens first and mathy/math happens second.
He worked in a gas station before he became famous.
Put out the fire before the house burns down.
I have not been there before.
She finished before me.
—
in front of something
She stood before him, looking into his eyes.
—
until
It took a few moments before I realized that she was joking.
yet
Adverb
—
When something hasn't happened yet, it didn't happen but it might happen in the future.
Is she there yet?
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Used to join words, phrases, and clauses that contrast.
It's cold outside, yet I don't see you wearing a coat.