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...
and so on等等all at once突然;同时，一起once(and)for all一劳永逸，限此一次by oneself独自地，单独地other than不同于all right好，行ever since从那时起，自那时以来ever so非常，极其so…as to结果是;如此……以至于at...