F-1 visa problems - please

basically what I got here for Canadians applying for F-1 @airport:

1. I-20
2. proof of financial support
3. SEVIS/receipt etc.

My question is: Do I need to fill out other forms, like if my families are already in the US, do they have US green card, etc?

the thing is: my whole families (my brothers, parents) are in the states with citizenship, well, if they don't ask, I don't speak it out loud, but do they want me to write it down/forms to fill out?

You also need to prove residence in canada. That may be wher eyou will have a problem.

But as long as you maintain a residnce in canada, your other ties in US (other than a US citizen spouse) should not hinder you.