phrase

• unable to do something

  formal
  not able to do something. In ordinary speech can't do something is the more usual way of saying this 不能做某事的（日常口語中更常用can’t do sth來表達此意）

  Some of the children were unable to read or write. 有些孩子還不會讀書寫字。

  feel unable to do something :

  Many teenagers feel unable to talk to their parents about their problems. 許多青少年感到無法與父母談論他們自己的問題。

  quite unable to do something (=completely unable) 完全不能做某事的 :

  He was quite unable to control his emotions. 他完全不能控制自己的感情。

  unwilling or unable to do something :

  The security forces are either unwilling or unable to spend more money. 保安部隊要麽是不願意多花錢，要麽是無法多花錢。

   Synonyms and related words

  Not skilful or able: incompetent, incapable, awful...