Practice
Can you start a sentence with because?
Sign in to saveBecause the bus was late, Mina missed the first five minutes of class. The sentence begins with because and still gives the reader a complete thought.
Write complete, clear sentences that begin with because or use because to connect a reason to a result.
Read and practice
Read the examples and try the written questions in this guide. Listening recordings are not available for this lesson yet.
Try the written questions
Because the roads were icy, the match was postponed. /bɪˈkɒz ðə rəʊdz wə ˈaɪsi, ðə mætʃ wəz pəˈspəʊnd/
The short answer
You can begin a sentence with because when the sentence includes both the reason and the main result. Put a comma after the opening because clause when it comes before the main clause.
Because the roads were icy, the match was postponed.
Why it works: The opening clause gives the reason, and the second clause gives the result. Together they make a complete sentence.
5 more examples
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Because I left my phone at home, I could not call you.
The reason comes first, so a comma separates it from the main clause.
Not this:I could not call you
because I left my phone at home. What changes: The main result comes first, so no comma is normally needed before because. -
Because the shop was closed, we returned the next day.
The sentence is complete because it says both why the plan changed and what we did.
Not this:
Because the shop was closed. What changes: This is a fragment in formal writing because it gives a reason without the result. -
Because the instructions were unclear, the team asked for help.
The main clause can be short. It only needs to finish the thought started by because.
Not this:The team asked for help
because the instructions were unclear. What changes: Both word orders are natural. Choose the order that gives the emphasis you want. -
Because it was raining, we ate inside.
It is a normal pronoun subject in the reason clause. The sentence still needs the result clause.
Not this:We ate inside
because it was raining. What changes: Putting the result first is often useful when the result is the main point of the sentence. -
Because the deadline moved, Priya had time to check the figures again.
The opening clause explains the cause. The main clause tells the reader what became possible.
Not this:Priya had time to check the figures again
because the deadline moved. What changes: This version gives Priya's action before it gives the explanation.
Read the full guide
Look for two ideas: a reason and what happened because of that reason. In Because the roads were icy, the match was postponed, the first clause answers why and the second clause states the event. You can reverse the order: The match was postponed because the roads were icy. The meaning stays close, but the punctuation changes.
Because can come first
There is no grammar rule that bans because from the beginning of a sentence. Writers put the reason first when they want the reader to have that context before the result. The sentence must still contain a main clause after the because clause.
Because the train was cancelled, Jordan worked from home.
The first clause explains why. Jordan worked from home is the main clause that completes the sentence.
What information is still needed after Because the train was cancelled?
Add the result, for example: Because the train was cancelled, Jordan worked from home.
Do not leave a because clause on its own
Because introduces a dependent clause. A dependent clause has a subject and verb, but it depends on a main clause to express a complete thought. The wording Because I missed the alarm sounds unfinished when it appears alone in formal writing.
Because I missed the alarm, I arrived late.
I arrived late completes the thought. Without it, the reader knows the cause but not the result.
I arrived late because I missed the alarm.
This order is also complete. The main clause comes first and the reason follows it.
Use a comma after an opening reason clause
When a because clause appears before the main clause, put a comma where the main clause begins. The comma helps the reader see the boundary between the reason and the result. It is especially useful when the opening clause is long.
Because the supplier sent the wrong part, the repair took another week.
The comma comes after part because the main clause begins with the repair took another week.
Where does the comma go in Because the weather changed our flight left later?
Write: Because the weather changed, our flight left later.
Usually omit the comma when the result comes first
When the main clause comes first and because introduces the reason afterward, English normally does not use a comma before because. This order often works well when the main event is the point you want to stress.
Our flight left later because the weather changed.
The result appears first. The because clause supplies the reason, so no comma is normally needed.
Leah wore gloves because the paint was still wet.
The sentence begins with Leah's action and then explains the reason for it.
Choose the order that suits the message
The two word orders often communicate the same basic cause and result, yet they guide attention differently. Start with because when the reason prepares the reader for what follows. Put because later when you want to state the result immediately and explain it afterward.
Because the museum was free on Friday, it was crowded by noon.
The reason appears first, so the crowd makes sense as soon as the reader reaches the main clause.
It was crowded by noon because the museum was free on Friday.
This version leads with the crowd and gives the explanation after it.
Keep short because answers in the right setting
Conversation allows short answers because the listener already knows the question. If someone asks Why are you leaving early?, a speaker can answer Because I have an appointment. In a piece of formal writing, add the missing main clause unless the surrounding sentence already makes it clear.
Why did you turn the lights on? Because the room was getting dark.
The question supplies the missing context, so the short spoken answer is understandable.
How can you revise Because the room was getting dark for a formal report?
Write a complete sentence, such as: We turned the lights on because the room was getting dark.
Before you go
Remember this
Starting with because is correct when you finish the sentence with a main clause. Use a comma after an opening because clause. If the main clause comes first, because normally introduces the reason without a comma. Read the sentence once more and ask whether it answers both why and what happened.
Practice with the written examples
You can practice with the written questions in the Learn tab. Each answer includes an explanation.
Try the written questionsListening test not available yet
This lesson does not have the recordings needed for a listening test. Use the written questions in the guide to check your understanding.
Try the written questionsQuestions about "Can you start a sentence with because?"
Can you start a sentence with because?
Yes. Start with because when you follow its reason clause with a main clause that states the result. For example, Because the roads were icy, the match was postponed is complete because it gives both the cause and the outcome.
Because I left my phone at home, I could not call you.
Why is Because I was late a sentence fragment?
Because I was late gives a reason but does not say what happened as a result. In formal writing, add a main clause, such as Because I was late, I missed the introduction, or put the result first: I missed the introduction because I was late.
I could not call you because I left my phone at home.
Do I need a comma before because?
Usually, use a comma after a because clause when it comes at the beginning of a sentence. When the main clause comes first, do not usually place a comma before because: We ate inside because it was raining.
Because the shop was closed, we returned the next day.
Can I use because as a short answer?
Yes, short because answers are common in conversation when the preceding question makes the result clear. After Why did you leave?, Because I was tired is understandable. In formal prose, a complete sentence is generally clearer.
Because the shop was closed.
Which order should I use with because?
Use Because + reason, result when the reason should prepare the reader for the outcome. Use Result + because + reason when you want to lead with what happened. Both orders can be grammatical when each contains a complete main clause.
Because the instructions were unclear, the team asked for help.