Simply is the adverb form of simple.
Some example sentences are:
Simply add the milk into the cake mix.
He is simply trying to help.
No. Simple is an adjective. The adverb form is "simply."
Adverb
simply
Simply is an adverb (in a simple way, or literally).
Simplement
Simply.
An adverb
"Was copying " doesn't contain an adverb, it is only a verb (or simple predicate).
No. Often is an adverb.
Both?
A verb in the simple past.
The adverb is invisibly. Many -LE adjectives can form the adverb by changng the final E to Y (able, ably / simple,simply).