can could would you how can we use it , there are some of illustration can or could ask people to do things can you wait a moment please ? could you wait a moment please ? we can use would and will to ask people to do thing but can and could are more usual 1- asking for things can i have salt ? could i have salt ? 2-asking to do thing can i use your phone ? do you think could i borrow your bike? 3-offering to do thing can i help you? 4-offering and inviting would you like tea or coffee? this is more polite way of say what you want