Question

An adverbial clasue is a subordinate clause that is used as an adverb to modify a verb, and adjective, or a(n)

Answer 1

1)Adverb
2)To
3)To show us the cave paintings
4)"Of course I don't know."

Answer 2

1. Adverbial clause is used as an adverb to modify a verb, an adjective, or an adverb.

2. An infinitive is a verb form that usually starts with "to.": to talk; to like etc.

3. "to show us the cave paintings" is an infinitive phrase. The other "to" in "to the ceiling" is a preposition.

4. "now here's your kettles, done" is a vernacular because it contains informal language: here's your kettles (plural word and a singular verb); done (instead of it's done.)