However, Although, Because, So
These words join ideas. Because and so show a reason and a result. Although and however show contrast: one idea is different from what we expect.
Structure
- Because: because + reason. It joins two parts of a sentence. Example: I stayed home because it was raining.
- So: comma + so + result. It joins two parts of a sentence. Example: It was raining, so I stayed home.
- Although: although + contrasting fact. This fact makes the other part of the sentence unexpected. Example: Although it was raining, we went out.
- However: we usually use it at the start of a new sentence. Put a comma after it. Example: It was raining. However, we went out.
How the Grammar Works
- Because answers the question 'Why?'. It gives the reason: She passed the exam because she studied hard.
- So gives the result. The reason comes first: She studied hard, so she passed the exam.
- Although introduces a contrasting fact. The surprising part is in the other part of the sentence: Although she didn't study much, she passed the exam. (Passing is the surprise.)
- However shows the same contrast, but we usually start a new sentence with it. Put a comma after it: She didn't study much. However, she passed the exam.
- The because part and the although part can come first or second. If it comes first, use a comma. If it comes second, we usually do not use a comma. The so part always comes second.
Because I was tired, I went home. / I went home because I was tired.
Although it was raining, we went out. / We went out although it was raining.
Common Use Cases
- Explaining reasons: I'm tired because I didn't sleep well.
- Explaining results: I didn't sleep well, so I'm tired.
- Showing contrast in one sentence: Although it's expensive, I want to buy it.
- Showing contrast between two sentences: It's expensive. However, I want to buy it.
Frequent Mistakes and How to Avoid Them
- Mixing up the reason and the result. Because gives the reason. So gives the result. Incorrect: I stayed home so it was raining. Correct: I stayed home because it was raining. Or: It was raining, so I stayed home.
- Using 'however' like 'although' in one sentence. Incorrect: However it was raining, we went out. Correct: Although it was raining, we went out.
- Forgetting the comma after 'however'. Incorrect: It was raining. However we went out. Correct: It was raining. However, we went out.
- Using two connectors for the same two parts. Use only one. Incorrect: Although it was raining, but we went out. Correct: Although it was raining, we went out.
- Incorrect: Because I was tired, so I went home. Correct: Because I was tired, I went home. Or: I was tired, so I went home.
Comparison with Related Grammar
You already know but. It shows contrast too. These three sentences have the same meaning, but the structure is different.
- It's small, but it's nice. (but + second part)
- Although it's small, it's nice. (although + first part, comma, second part)
- It's small. However, it's nice. (two sentences)
Do not use although and but together in one sentence. Choose one.
Example Sentences
- Because the traffic was bad, I was late.
- I was late because the traffic was bad.
- The traffic was bad, so I was late.
- Although the traffic was bad, I arrived on time.
- The traffic was bad. However, I arrived on time.
- She bought the jacket although it was too expensive.
When to Use This Rule
Use because for a reason and so for a result. Use although for contrast in one sentence. Use however, usually at the start of a new sentence, for contrast between two sentences.