be burned out住所被烧光
be busy with忙于…
be careful of爱惜，注意
be born of出生于…(家庭)
be buried in沉思，陷入，专心于
be busy(doing)忙着(做某事)
be busy about忙于……
be careful to(do)务必注意(做)
be certain to(do)一定(做)，必然(做)
be confident in对…有信心
be clever at擅长于
be composed of由…组成
be connected with与…有关
be covered with被…覆盖
be curious to(do)很想(做)
be derived from由…得到
be capable of能够
be characterized by以…为特征
be combined with与…结合
be concerned about关心，挂念
be coupled with与……配合
be crowded with挤满，拥塞
be dependent on/upon取决于，依赖
be determined to(do)决心(做)
be different from与…不同