not able 与unable的区别

not able 与unable的区别 be unable to do与be not able to do有什么区别 问下be not able to/be unable to/can't 有什么区别 not be able to =be unable to? 这个词组的否定形式是什么 able与capable的区别 be not able to do sth be unable to do sth区别They failed to pass the exam last time,I regretted ___.A.being unable to helpB.being not able to help They failed to pass the exam last time,I regretted___.A.being unable to help B.not to be able to help请解释为什么.regret to do 和 regret doing 的区别 can与be able to的区别 be able to与can 的区别 be able to 与 can的区别 disabled 和unable 的区别? They stood there,unable to make adecision.为什么不能用not able to unable和have not been able哪个更常用,有什么不同 unable,able,disable,enable用法 Sometimes silence is not only unable to tell与他相反的英文怎么说呀 may be able to与be able to之间的区别如题 详细 谢谢! can与be able to的时态上的区别 can 与be able to 的具体区别 和 用法