我们俩关系最好，他经常来我这儿蹲饭吃。
[误] We are best friends. He always comes here to have meals for free.
[正] We are best friends. He always comes here to bum meals off me.
注：第一句只表明“他常到我这儿来白吃白喝”，但朋友这间那种亲密关系没有体现出来。而
bum sth. off sb. 指向非常熟的朋友要一些不起眼的小东西，而朋友也不会介意还不还。