Writing · Commas
Rewrite each sentence with the correct comma usage. Some sentences need a comma after an introductory clause; others have commas that should be removed. Type your answer and click Check Answer.
About This Rule
- When a sentence begins with a dependent clause introduced by a subordinating conjunction (after, although, because, before, if, since, unless, until, when, whenever, while), put a comma after the clause: Because the weather was nice, the students studied outside.
- When the dependent clause comes after the main clause, a comma is usually not needed: The students studied outside because the weather was nice.
- Do not put a comma between a preposition and its object (during the first week, not during, the first week), or directly after a subordinating conjunction (Although the lot is full, not Although, the lot is full).