Links
This is a wonderful site for getting extra help on grammar. There are exercises with answers. Give it a try. I like this site the best!
interactive games to test your skills on parts of speech
See how many races you can win. Test your skill on phrases, independent clauses, and dependent clauses.
Try the quiz under grade 7: unit 8: complex sentences.
Here's a helpful video for understanding compound and complex sentences.
Scroll down to the middle of the page and try a few activities on simple, compound and complex sentences.
Check out this video on how to use punctuation.