unableunable /ʌnˈeɪbəl/ adjective [not before noun] 
not able to do something无法做某事no poder hacer algonão conseguir fazer algo〜することができない무언가를 할 수 없는unable to do something
Lucy was unable to find out what had happened.露西无法弄清楚发生了什么事。Lucy no pudo averiguar qué había pasado.Lucy não conseguiu descobrir o que havia acontecido.ルーシーは何が起きたのかを知ることができなかった。루시는 무슨 일이 있었는지 알아낼 수 없었다. Unable to sleep, I got up and made myself a drink.睡不着，我起床给自己倒了杯饮料。Sin poder dormir, me levanté y me preparé una bebida.Sem conseguir dormir, me levantei e me preparei uma bebida.眠れなかったので、起き上がって飲み物を作った。잠을 잘 수 없어서 일어나 마실 것을 만들었다.Register语体RegistroRegistro語域어체In everyday English, people usually say that they can't/couldn't do something rather than are/were unable to do something:· She couldn't find out what had happened.在日常英语中，人们通常说 can't/couldn't do something，而不是 are/were unable to do something：· She couldn't find out what had happened.En el inglés cotidiano, la gente suele decir can't/couldn't do something en lugar de are/were unable to do something:· She couldn't find out what had happened.No inglês cotidiano, as pessoas geralmente dizem can't/couldn't do something em vez de are/were unable to do something:· She couldn't find out what had happened.日常の英語では、are/were unable to do something よりも can't/couldn't do something と言うのが一般的です：· She couldn't find out what had happened.일상적인 영어에서는 are/were unable to do something보다 can't/couldn't do something이라고 말하는 것이 더 일반적입니다:· She couldn't find out what had happened.
not able to do something无法做某事no poder hacer algonão conseguir fazer algo〜することができない무언가를 할 수 없는unable to do something Lucy was unable to find out what had happened.露西无法弄清楚发生了什么事。Lucy no pudo averiguar qué había pasado.Lucy não conseguiu descobrir o que havia acontecido.ルーシーは何が起きたのかを知ることができなかった。루시는 무슨 일이 있었는지 알아낼 수 없었다. Unable to sleep, I got up and made myself a drink.睡不着，我起床给自己倒了杯饮料。Sin poder dormir, me levanté y me preparé una bebida.Sem conseguir dormir, me levantei e me preparei uma bebida.眠れなかったので、起き上がって飲み物を作った。잠을 잘 수 없어서 일어나 마실 것을 만들었다.Register语体RegistroRegistro語域어체In everyday English, people usually say that they can't/couldn't do something rather than are/were unable to do something:· She couldn't find out what had happened.在日常英语中，人们通常说 can't/couldn't do something，而不是 are/were unable to do something：· She couldn't find out what had happened.En el inglés cotidiano, la gente suele decir can't/couldn't do something en lugar de are/were unable to do something:· She couldn't find out what had happened.No inglês cotidiano, as pessoas geralmente dizem can't/couldn't do something em vez de are/were unable to do something:· She couldn't find out what had happened.日常の英語では、are/were unable to do something よりも can't/couldn't do something と言うのが一般的です：· She couldn't find out what had happened.일상적인 영어에서는 are/were unable to do something보다 can't/couldn't do something이라고 말하는 것이 더 일반적입니다:· She couldn't find out what had happened.