be able to(do)能(做)，會(huì)(做)
    be absent from缺勤，缺課
    be accustomed to習(xí)慣于
    be active in積極于
    be alive to發(fā)覺，感覺，對(duì)…敏感
    be angry with對(duì)...發(fā)怒
    be anxious for急切盼望，渴望
    be ashamed of為…感到害臊
    be about to(do)即將，正要
    be abundant in富于，富有
    be acquainted with與…相識(shí)，熟悉
    be afraid of恐怕，害怕，擔(dān)憂
    be angry at因某事生氣
    be anxious about擔(dān)心，為…擔(dān)憂
    be anxious to(do)渴望(做)
    be aware of意識(shí)到
    be bad at拙于，不善于
    be based on根據(jù)，以…為基礎(chǔ)
    be beside oneself忘乎所以
    be badly off生活窮困
    be bent on熱戀于，一心想
    be better off處境較好，情況好轉(zhuǎn)
    be born in出生于...
    be bound to(do)一定會(huì)，不得不