Английский словарь американских идиом - impose on

{v.} To try to get more from (a person who is helping you) than he or she intended to give. * /Don't you think you are imposing on your neighbor when you use his telephone for half an hour?/ * /You may swim in the Allens' pool so long as you do not impose on them by bringing all your friends./ Compare: TAKE ADVANTAGE.