Yes. Got here:
http://www.scriptsecrets.netAnd here:
http://www.scriptsales.comPay special attention to the messageboards (and for God's sake, read some of the posts before you ask questions, so that you don't ask something that's been asked every twenty minutes since the dinosaurs died out).
Then go for some books. Read J. Michael Stracszynski's Complete Book of Scriptwriting. Read William Martell's Secrets of Action Screenwriting (available from the Script Secrets site above). And whatever else your library has.
And then read scripts. Lots of scripts. You can find plenty here:
http://www.script-o-rama.comhttp://iscriptdb.comAnd when you're finished with all that, come back for more.