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1. She needs some money to buy a book, so she decides to work part-time.
2. I had sent the whole day helping her, so I felt too tired.
3. They were in difficulty, but they tried their best to graduate.
4. He broke his leg last year, but he wanted to take part in this game.
5. She didn't want to hear the story again , for she had heard it all before./She had heard the story all before, so she didn't want to hear it again.
6. She is often absent from class, so she can't keep pace with her classmates.
7. It's very cold, so we can't go swimming.
8. You drink too much coffee, so you can't sleep.

9. I couldn't write to Alice, for I didn't know her address./ I didn't know her address, so I couldn't write to Alice.
10. The weather was so terrible, but they still wanted to come to the concert.

coordinating conjunctions: for, and, nor, but, or, yet, so

1. She needs some money to buy a book, so she decides to work part-time

2. I had spent the whole day helping her, so I felt too tired

3. they were in difficulty but they tired their best to gradurate

4. he broke his leg last year, but he wanted to take part in this game

5. She had heard the story before, so she didnt want to hear it again

6. she is often absent from class, so she cant keep pace with her classmates

7. it's very cool, so we cant go swimming

8. you drink too much cofffee, so you cant sleep

9. I didn't know Alice's address, so I couldn't write to her

10. the weather was so terible, but we still wanted to come to the concert