是have difficulty doing sth还是have difficult doing sth?

是have little difficulty?还是have some difficulty?为什么？有什么区别？ 是have difficulty doing sth还是have difficult doing sth? have a difficulty in doing something difficulty 是不可数的吗?in 可不可以省略? have difficulty 后跟什么? have difficulty gainning have difficulty in have some difficulty 是用单数还是用复数 difficulty可数吗高中改错题：I have some difficulty with the use of the language.difficulty是可数的,但为什么不把它改成复数? 请问做某事有困难的短语是：have some difficulty in doing sth.中的difficulty能不能用difficulties have difficulty with sth 对么 .have some difficulty or difficulties? 用have difficulty doing 造句 have difficulty on sth对吗是不是have difficulty in doing sth,have difficulty on sth policy,difficulty是不可数? have difficulty with sth中difficulty要不要遍复数? have some difficulty (in) doing sth.中的 difficulty可数吗 Did you have any difficulty in learning English last year为什么difficulty在这句话中有时复数又是单数?到底怎么回事啊? have some difficulties还是difficulty in