最佳答案：1.be able to翻译表示“能够做某事”，强调通过努力而获得的能力。She is able to play the piano.她能够弹钢琴。2.be able to后面接动词原形be able
1.be able to翻译
表示“能够做某事”，强调通过努力而获得的能力。
She is able to play the piano.
她能够弹钢琴。
2.be able to后面接动词原形be able to do sth. 能够做某事He is able to drive a car.他会开车。
3.be able to的时态一般现在时：am/is/are able to一般过去时：was/were able to一般将来时：will be able to现在完成时：have/has been able toI am able to run very fast.我能够跑得非常快。
4.be able to的否定一般现在时：am not/isn’t/aren’t able to 一般过去时：wasn’t/weren’t able to一般将来时：won’t be able to现在完成时：haven’t /hasn’t been able to
5.be able to的同义词was/were able to ≈ couldam/is/are able to ≈ canwasn’t/ weren’t able to ≈ couldn’t （最常用）am not/ isn’t /aren’t able to ≈can’tbe able to的否定式与be unable to同义比如：isn't able to = is unable toweren’t able to = were unable to
