Can could and would be used as polite forms of can and will?<br/><br/>Could you please pass the salt. Rather than Can you please pass the salt. <br/><br/>I would love to go out to dinner with you! Compared to I will love to go out to dinner with you!<br/><br/>Other examples:<br/><br/>Could you please move out of the way. Can you please move out of the way.<br/><br/>I would like the pizza please. I'll have the pizza please.