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bum的一般过去时为：bummed...
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n.流浪者，屁股，狂欢作乐，笨蛋，废物vt.乞讨vi.流浪，闲荡adj.质量低劣的，无价值的，无价值的，残废的，很不愉快的...
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Mind if I bum a cigarette?能给我一支烟吗？He knows you're getting a bum deal.他知道你在做一笔烂生意。John lost his job and went on the bum.约翰失业后过着流浪生活....
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Can I bum a cigarette off you?可以向您要支烟吗?Why don’t you stop behaving like a bum and get this place cleaned up?你不要再像一个懒鬼的样子，赶紧把这地方收拾一下好吗？He looks like a bum who's been drowning his sorrows in sleazy dives.他看起来象个游手好闲之辈,...
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bum的音标：bum的英式发音音标为：[bʌm]bum的美式发音音标为：[bʌm]...
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bum的现在完成时为：bummed...
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bum的第三人称单数（三单）为：bums...
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bum的现在进行时为：bumming...