"Help"

Which of the following statements are grammatically correct? For those which are correct, what are their meanings? (No I do not have the answer.)

1. Help.
2. Help with something.
3. Help to something.
4. Help do something.
5. Help to do something.
6. Help doing something.
7. Help to doing something.
8. Help somebody.
9. Help somebody with something.
10. Help somebody to something.
11. Help somebody do something.
12. Help somebody to do something.
13. Help somebody doing something.
14. Help somebody to doing something.