| Word | Explanation | Example |
|---|---|---|
| because | The reason is very important in the sentence, so because comes in the sencond clause of the sentence. | I read this book because I like it. |
| as | The reason is already known. | As we read, we learn. |
| since | The reason is already known. (more formal than as) | Since we were in the computer lab, our English has improved. |
| for | The reason is given at the end of the sentence. | We went to a small restaurant – for we were hungry. |
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