Independent Clause
Independent-clause recognition is central to sentence boundaries and punctuation. The practical test is whether the clause has the grammatical structure to function as a sentence without depending on another clause.
An independent, or main, clause can stand as a complete sentence in grammatical terms. It can also be joined to another independent clause or contain dependent material, so independence does not mean the clause must always appear by itself in polished prose.
Key details
Important caveats
Boundary
An independent clause can contain phrases and dependent material; internal complexity does not make it subordinate.
Further guidance
Diagnostic
Check whether the clause has the structure needed to stand as a sentence in its context rather than depending on another clause.
Joining
When two independent clauses are combined, choose punctuation or coordination appropriate to the intended relationship.
Worked Example
“The review ended” is an independent clause. In “The review ended, and we sent the notes,” it remains independent even though it is coordinated with another clause.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- Clauses (opens in a new tab)Cambridge University Press · Cambridge defines subordinate/dependent clauses as clauses that cannot form sentences on their own and depend on main clauses; they may be finite or non-finite.
- Sentence Punctuation Patterns (opens in a new tab)Purdue Online Writing Lab · Purdue uses independent-clause patterns to explain complete sentences and how independent clauses are joined, giving a practical writing boundary beyond definition alone.