1. Simple: I went to the store.
2. Complex: Even though I wasn't sure what I wanted, I went to the store.
3. Compound: I went to the store, and I bought some snacks.
4. Compound-complex: Although I wasn't sure what I wanted, I went to the store, and I bought some snacks while I was there.

5. Simple: She ran away.
6. Complex: Even after she had been warned of the danger, she ran away.
7. Compound: She ran away, and she never returned.
8. Compound-complex: After she had been warned of the danger, she still ran away, and she never returned.

9. Simple: He told a lie.
10. Complex: Because he was embarrassed, he told a lie.
11. Compound: He told a lie, and he was caught.
12. Compound-complex: Since he was embarrassed, he told a lie, and he was caught in the end.

13. Simple: We sang a song.
14. Complex: Although none of us knew the words, we sang a song.
15. Compound: We sang a song, and we had fun.
16. Compound-complex: Although none of us knew the words, we still sang a song, and we had fun while we did it.