An 'adverb clause' is a subordinate clause that modifies a verb, an adjective, or another adverb. It tells when, where, how, to what extent or under what conditions.
Elliptical.
I know how to play as many songs as he.
An elliptical adverb clause is one that omits words that may be understood. For example, in the sentence "he is more knowledgeable than I" the pronoun I is used because the full clause would be "than I am knowledgeable." The same applies for an omitted subject: "He was more startled than scared" omits the words "he was" before scared.
adverb clause
When he was young ... - as in When he was young he did some very foolish things - is an adverb clause of time.
Elliptical.
I know how to play as many songs as he.
An elliptical clause is set off by ellipses (...).
An elliptical adverb clause is one that omits words that may be understood. For example, in the sentence "he is more knowledgeable than I" the pronoun I is used because the full clause would be "than I am knowledgeable." The same applies for an omitted subject: "He was more startled than scared" omits the words "he was" before scared.
elliptical clause
The adverb clause is "when the moon is full." The subordinating conjunction is when, the subject is moon, and the verb is "is."
An elliptical clause is a type of clause in which words or phrases are omitted because they can be understood from context. This omission makes the sentence more concise. Elliptical clauses are common in spoken language and informal writing.
The underlined clause "when the race began" is an adverb clause modifying the adverb "novanent" in the sentence: "The runners increased their speed when the race began."
An embedded clause is not an adverb. It is a type of subordinate clause that is embedded within a main clause and functions as a noun, adjective, or adverb within the sentence.
adverb clause
It is an adverb clause. It will say "when" an activity may take place.
When he was young ... - as in When he was young he did some very foolish things - is an adverb clause of time.