Because or So?
Use because before the reason and so before the result. One sentence uses one of them, not both.
BECAUSE + REASONresult first, reason second
She stayed home because she was sick.
SO + RESULTreason first, result second
She was sick, so she stayed home.
Each half has its own subject: she was sick, she stayed home.
TRY IT
- Question 1
"We opened the window blank the room was hot."
- Question 2
"The café was full, blank we sat outside."
The patterns
BECAUSE
resultbecauseSV
We took a taxi because the bus didn't come.
Because first? Put a comma after that half.
SO
reason,soSV
The film was boring, so we left early.
Put a comma before so.
ANSWERING WHY
Why …?—BecauseSV
Why were you late? — Because I missed the train.
When you speak, the because half alone is enough.
TRY IT
- Question 1
"Why did you sell your bike?" — "Because blank too old."
When to use each one
Saying sorry for being late
Sorry I'm late. There was a lot of traffic, so I took a taxi.
The reason first, then what you did.
Texting to cancel
I can't come tonight because I have to work late.
The news first, then the reason.
So or But?
| SO · AS EXPECTED | BUT · NOT AS EXPECTED | |
|---|---|---|
| Studying | He studied hard, so he passed the test. | He studied hard, but he failed the test. |
| Weather | It was cold, so we stayed inside. | It was cold, but we went swimming. |
Is the second half a surprise? Use but.
TRY IT
- Question 1
"The hotel was cheap, blank the room was very clean."
Common mistakes
Incorrect:Because the road was wet, so he drove slowly.
Correct:Because the road was wet, he drove slowly.
Use one word, because or so. Not both.
Incorrect:Why did you go home? — Because tired.
Correct:Why did you go home? — Because I was tired.
Even a short answer needs a subject and a verb after because.
Incorrect:We stayed home because the rain.
Correct:We stayed home because of the rain.
Before a noun alone, say because of. Or: because it was raining.
Incorrect:She didn't come to class, so she was sick.
Correct:She didn't come to class because she was sick.
Being sick is the reason. The reason goes after because.
Incorrect:I lost my keys, so waited outside.
Correct:I lost my keys, so I waited outside.
The half after so needs its own subject: I.
Incorrect:So the tickets were expensive, we didn't go.
Correct:The tickets were expensive, so we didn't go.
So goes before the result, not the reason.
Quick check · 5 questions
Choose the word that completes the sentence:
Nam went to the doctor because his leg hurt.
- A. because — Correct
- B. so
- C. but
Answer: A. because
The reason goes after because.
Choose the word that completes the sentence:
The water was very cold, so the children didn't swim.
- A. so — Correct
- B. because
- C. but
Answer: A. so
The cold water comes first. The result comes second, after so.
Choose the sentence with the same meaning as: The shop was closed, so we went home.
We went home because the shop was closed.
- A. We went home because the shop was closed. — Correct
- B. The shop was closed because we went home.
- C. We went home, so the shop was closed.
Answer: A. We went home because the shop was closed.
The closed shop is still the reason.
Choose the best answer:
"Why did you call Mai?" — "Because I needed her help."
- A. Because I needed her help. — Correct
- B. Because needed her help.
- C. So I needed her help.
Answer: A. Because I needed her help.
Why asks for a reason. Start with because, and keep the subject: I needed.
Choose the word that completes the sentence:
The test was easy, but many students failed it.
- A. but — Correct
- B. so
- C. because
Answer: A. but
You expect people to pass an easy test.
See whether it really stuck.
Start the quiz · 12 questions
