be able to(do)能(做),会(做)
be absent from缺勤,缺课
be accustomed to习惯于
be active in积极于
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 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 aware of意识到
be bad at拙于,不善于
be beside oneself忘乎所以
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