There are two major types of clauses main (or independent) clause and subordinate (or dependent) clause.
Main Clause and Subordinate Clause – Comparison
Turn off the lights when not in use
The above sentence has two clauses “Turn off the lights” and “When not in use”. The clause “Turn off the lights” expresses a complete thought and can alone stand as a sentence. Such a clause is called main or independent clause.
While the clause “when not in use” does not express a complete thought and can’t stand as a sentence. It depends on another clause (main clause) to express complete idea. Such a clause is called subordinate or dependent clause.
Main or Independent Clause
“Main (or independent) clause is a clause that expresses a complete thought and can stand as a sentence.
Subordinate (or dependent) clauses cannot stand by themselves and are further divided into tree types,
1. Noun Phrase,
2. Adjective Phrase,
3. Adverb Phrase