Avoid is not any type of adverb because it's a verb.
The closest adverb form is avoidably, from the derivative adjective avoidable.The verb avoid has the past participle adjective avoidedbut this does not have an adverb form.
No, it's a verb.
It is time adverb
It is an adverb of degree.
Adverb of Degree
adverb of degree
There is no adverb derived from type. Not every word has a corresponding noun verb adverb adjective etc
It's an adverb of time.
No, it is an adverb of indefinite time. This is another type of adverb of time.
Is is not an adverb it is a be verb. Be verbs are: present -- am is are past -- was were
when
adverb of frequency, like - sometimes always often