beat， be 太累了

beef about 抱怨

beef up 加强

before you are scheduled to leave 在你决定离开之时间前

Before you could say Jack Robinson 很快

before you know it 很快

behave yourself 请检点一点

behind bars 坐牢

behind one's back 背后

behind the scenes（curtain） 在幕后

behind the times 不合时宜

behind time 误期

believe it or not 信不信由你

benefit from 从中得到

best-seller 畅销书、唱片等

bet it is 当然是

better half 老婆

better luck next time 下次好运些吧

better than， be 比……多；多于

between my ribs and my back bone 肚子

beyond one's reach of 超出支付能力

beyond sb， be 使某人无法理解

big bluffer 吹牛者

bite one's head off 大发脾气

black and blue 遍体鳞伤

black sheep 不肖子女

blame sb for sth 为某事责备某人