need some help

Hello everyone,
I need a little help here about my issues. Could anybody here give an advice? My parents’ green card holders, I received my I-20 from University. Is it right that if my parents’ legal permanent residents I almost haven't chance to visit America as student.
Thank you!

Not true, if you are over 21. If under 21, the border could tell you that you might immigrate, but that is far-fetched. You need to keep Cdn ties for F1 entry. That should be enough.