1. S
2. C
3. S
4. C
5. S
6. C
7. S
8. S
9. C
10. S
11. C
12. S
13. S
14. C
15. S
16. C
17. Simple: I didn't do my homework, so I went to the back room. Compound: I didn't do my homework, and I went to the back room.
18. Simple: The big green apple is on the table. Compound: The big green apple is on the table, and the small red one is in the bowl.
19. I walked to the store, bought some milk, and returned home.
20. She finished her homework, ate dinner, and watched a movie before going to bed.
Parent Tip: Review the logic above to help your child master the concept of complex sentence worksheet 3rd grade.