Final answer:
The correct sentence is 'Before we left the house, we checked the windows,' as it properly uses a comma after the introductory clause. Other options either do not use a comma or place it incorrectly. Remember to use a comma after introductory clauses to maintain clarity in your writing.
Explanation:
Understanding Introductory Clauses and Commas
In English, commas are often used after introductory clauses to separate them from the main part of the sentence. An introductory clause is a phrase that provides background information or sets the stage for the main idea of the sentence.
Among the options given, the correct use of a comma after an introductory clause is:
- Before we left the house, we checked the windows.
In this sentence, the clause "Before we left the house" sets the context for the action that follows, which is "we checked the windows." The comma is correctly placed to separate the introductory clause from the main clause.
The other options are incorrect because:
- "Before we left the house we checked the windows." - No comma is used here.
- "Before, we left the house we checked the windows." - The comma placement is incorrect, as it disrupts the flow of the introductory clause.
- "We checked the windows before, we left the house." - This option changes the meaning and uses a comma incorrectly in the middle of the sentence.
Conclusion
For clarity and correctness, always remember to place a comma after an introductory clause before transitioning to the main clause of the sentence.
Learn more about commas after introductory clauses here:
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