There's no word "subortant" in the English language. You likely meant "subordinate."
Here's how to understand the use of "subordinate" in relation to commas:
* Subordinate Clause: A subordinate clause is a dependent clause that cannot stand alone as a complete sentence. It often begins with a subordinating conjunction like "because," "although," "since," "while," "if," "when," etc.
* Commas and Subordinate Clauses: A comma is used before a subordinate clause that comes after an independent clause.
Example:
* Incorrect: She went to the store, because she needed milk.
* Correct: She went to the store, because she needed milk.
Important Note: If the subordinate clause comes *before* the independent clause, no comma is needed.
Example:
* Correct: Because she needed milk, she went to the store.
Let me know if you have any more questions about grammar or punctuation!