be alive to发觉，感觉，对…敏感
be angry with对……发怒
be anxious for急切盼望，渴望
be ashamed 0f为…感到害臊
be about to(do)即将，正要
be abundant in富于，富有
be acquainted with与…相识，熟悉
be afraid of恐怕，害怕，担忧
be angry at因某事生气
be anxious about担心，为…担忧
be anxious t0(do)渴望(做)
be aware of意识到
be bad at拙于，不善于
be based 0n根据，以…为基础
be beside oneself忘乎所以
be badly off生活穷困
be bent on热恋于，一心想
be better 0ff处境较好，情况好转
be born in出生于……
be bound to(do)一定会，不得不
be burned out住所被烧光
be busy with忙于…
be careful 0f爱惜，注意
be born 0f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 t0(do)务必注意(做)