be bad at 拙于，不善于
be badly off 生活穷困
be based on 根据，以……为基础
be bent on 热恋于，一心想
be beside oneself 忘乎所以
be better off 处境较好，情况好转
be born in 出生于……
be born of 出生于……(家庭)
be bound to (do) 一定会，不得不
be buried in 沉思，陷入，专心于
be burned out 住所被烧光
be busy (doing) 忙着(做某事)
be busy with 忙于……
be busy about 忙于……
be careful of 爱惜，注意
be careful to (do) 务必注意(做)
第四十四组
be certain to (do) 一定(做)，必然(做)
be capable of 能够
be confident in 对……有信心
be characterized by 以……为特征
be clever at 擅长于
be combined with 与……结合
be composed of 由……组成
be concerned about 关心，挂念
be connected with 与……有关
be coupled with 与……配合
be covered with 被……覆盖
be crowded with 挤满，拥塞
be curious to (do) 很想(做)
be dependent on/upon 取决于，依赖
be derived from 由……得到
be determined to (do) 决心(做)
点睛：最适合应用在写作中的表达
【例句】The refugees are badly off for blankets, and even worse off for foods.
难民需要毯子,更需要食物。
【例句】Support of the cease-fire was coupled with considerable vagueness as to what the parties were supposed to do afterward.
一方面支持停火，但另一方面对于双方停火后怎么办的问题却含混其词。
