conjunction: while; during the time that
As the meeting began, the lights flickered.
conjunction: because; since
As it was late, we took a taxi.
conjunction: although; even though
Tired as he was, he finished the report.
preposition: in the role, function, or capacity of
He works as a consultant.
adverb: used in comparisons to indicate the same degree or amount
She is as tall as her older brother.
adverb: in the manner that; in the way that
Do as I instructed and you’ll finish on time.
