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).
Simply.
An adverb
Simplement
"Was copying " doesn't contain an adverb, it is only a verb (or simple predicate).
No. Often is an adverb.
Both?
The adverb is invisibly. Many -LE adjectives can form the adverb by changng the final E to Y (able, ably / simple,simply).
A verb in the simple past.