Read the following sentences:

• You may sit here.
• You may sit wherever you like.

In sentence 1, the word here modifies the verb sit. It therefore does the
work of an adverb.

In sentence 2, the group of words ‘wherever you like’ also modifies the verb sit and hence does the work of an adverb. But because it has a subject and a predicate of its own, it is called an adverb clause.

An adverb clause is a group of words which has a subject and a predicate of
its own, and does the work of an adverb.

More examples of adverb clauses are given below:

• We got the seeds planted before the monsoons came.
• I will wait until he returns.
• Where there is a will, there is a way.
• I will remain where I am.
• He finished first though he started late.
• If you eat too much, you will fall ill.

Related posts:

1. Adjective clauses
2. Clauses
3. What are Phrases and Clauses?
4. Noun clause
5. More about adjective clauses
6. Uses of a noun clause
7. Simple and Compound sentences
8. How to construct a sentence having a noun clause
9. Complex and Compound-complex sentence