definition of adverbial clause

For those of you wondering what is an adverbial clause, here is a short definition of it.

An adverbial clause is a clause that functions as an adverb. In other words, it contains subject (explicit or implied) and predicate, and it modifies a verb.

• I saw Joe when I went to the store. (explicit subject I)
• He sat quietly in order to appear polite. (implied subject he)

According to Sidney Greenbaum and Randolph Quirk, adverbial clauses function mainly as adjuncts or disjuncts. In those functions they are like adverbial phrases, but in their potentiality for greater explicitness, they are more often like prepositional phrases

• We left after the speeches ended. (Is it an adverbial clause, adverbial phrase or preposition phrase?)
• We left after the end of the speeches.(Is it an adverbial clause, adverbial phrase or preposition phrase?)

Contrast adverbial clauses with adverbial phrases, which do not contain a clause.

I like to fly kites for fun.

Kinds of adverbial clauses

 

kind of clause	common conjunctions	function	example
time clauses	when, before, after, since, while, as, as long as, until,til, etc. (conjunctions that answer the question "when?"); hardly, scarcely, no sooner, etc.	These clauses are used to say when something happens by referring to a period of time or to another event.	Her father died when she was young.
conditional clauses	if, unless	These clauses are used to talk about a possible situation and its consequences.	If they lose weight during an illness, they soon regain it afterwards.
purpose clauses	in order to, so that, in order that	These clauses are used to indicate the purpose of an action.	They had to take some of his land so that they could extend the churchyard.
reason clauses	because, since, as, given	These clauses are used to indicate the reason for something.	I couldn't feel anger against him because I liked him too much.
result clauses	so..that	These clauses are used to indicate the result of something.	My suitcase had become so damaged on the journey home that the lid would not stay closed.
concessive clauses	although, though, while	These clauses are used to make two statements, one of which contrasts with the other or makes it seem surprising.	I used to read a lot although I don't get much time for books now
place clauses	where, wherever, anywhere, everywhere, etc. (conjunctions that answer the question "where?")	These clauses are used to talk about the location or position of something.	He said he was happy where he was.
clauses of manner	as, like, the way	These clauses are used to talk about someone's behaviour or the way something is done.	I was never allowed to do things the way I wanted to do them.
clauses of exclamation	what a(an), how, such, so	Exclamations are used to express anger, fear, shock, surprise etc. They always take an exclamation mark (!).	What horrible news! How fast she types! You lucky man!

  So, from the  definition that i looked up from the web, in my understanding adverbial clause is :

An adverb clause that will meet three requirements.

• First, it will contain a subject and verb.
• You will also find a subordinate conjunction that keeps the clause from expressing a complete thought.
• Finally, you will notice that the clause answers one of these three adverb questions: How?When? or Why?

Read these examples:

-Tommy scrubbed the bathroom tile until his arms ached.

*How did Tommy scrub? Until his arms ached, an adverb clause.

-Josephine's three cats bolted from the driveway once they saw her car turn the corner.

*When did the cats bolt? Once they saw her car turn the corner, an adverb clause.

-After her appointment at the orthodontist, Danielle cooked eggs for dinner  because she could easily chew an omelet.

*Why did Danielle cook eggs? Because she could easily chew an omelet, an adverb clause.

That is all i can say about adverbial clause if you have an easier explanation don't hesitate to leave me a comment. :)