Adverb Clauses of time

Adverb Clauses of time are introduced by the Subordinating Conjunctions whenever,
while, after, before, since, as, etc.
When you have finished your work you may go home.
I will do it when I think fit.
Don't talk while she is singing.
While I command this ship there will be good discipline.
He came after night had fallen.
After the law had been passed this form of crime ceased.
Do it before you forget.
Before you go bring me some water.