a. Compound sentences:
1. I want to lose weight, yet I eat chocolate daily.
2. I saw Samuel yesterday but he didn't see me.
b. Complex sentences:
1. Although my friends begged me, I chose not to go to the reunion.
2. Many people enjoyed the movie; however, Alex did not.
c. Compound complex sentences:
1. Don't leave the restaurant until the dishes here are washed.
2. While playing football, the ball thrown by my friend hit the boy crossing the street.
hope this helped....
have a good day ahead :)