what is the difference between seid and bist?
i cant tell the difference
Both are forms of the verb "sein" (to be). "Bist" is second person singular (du = you, one person); "seid" is second person plural (ihr = you, several persons).
Du bist klug. -- You are smart. (talking to one person)
Ihr seid klug. --- You are smart. (talking to more than one person)