The adverb is skillfully.
The adverb of the word skill is skilfully.An example sentence is: "he skilfully repaired the car".
Skillfully
Skillfully is the adverb form of skillful.
The adverb form of skillful is skillfully.
Skillfully is an adverb. Skillful is the adjective form.
Skilful (UK spelling) / skillful (US spelling) is not an adverb, no.Skilful/skillful is actually an adjective.The adverb form is Skilfully (UK) / skillfully(US).
Yes. It means in a skillful manner.
There is no adverb: the entire phrase beginning with "that's" is the object of the verb "think." (you think that)
Yes, it is. It means done using skill.
The word skilfully is an adverb.The adjective form of the word is skilful.
The adverb form is spelled skillfully, from the adjective skillful.
Busily is the adverb of busy.An example sentence is: "the beaver busily built the dam".Another example is: "Fred is busily painting the portrait".