It is important to put on safety glasses before you use a rotary saw.
Before is a preposition, so it's grammatically incorrect to use it as the last word in a sentence.
Before
The contract stipulates that the project must be completed within six months.
The monk bowed reverently before the sacred statue in the temple.
Before is to past as after is to future.
The subordinate clause in your sentence begins with the word before.
I have had a stroke vaccine before. is a good sentence.
You use a when its before a word that starts with a consonant and use an when its before a word that starts with a vowel
In your sentence it is "the."
I had never heard of that before.
you can use the word awoken is a sentence like this: The lad had just awoken before breakfast.
I am revising my essay to make sure it's free of errors.