have difficulty还是difficultyies （in）doing sth?老师讲师可数,补习书上特意讲的是不可数 到底可不可数啊统一一下啊、

have some difficulties还是difficulty in have difficulty doing sth 还是have difficulties dohave difficulty doing sth 还是have difficulties 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 some difficulty 是用单数还是用复数 have difficulty 后跟什么? have difficulty gainning have difficulty in have any difficulties with sth对还是have any difficulty with sth对 做某事有困难have difficulty in doing还是difficultieshave problem in doing 还是 problems 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 I have __________(困难) working out the math problem.用trouble还是difficulty? Do you have any () in understanding English?difficulty用单数还是复数 have difficulty with sth中difficulty要不要遍复数? have some difficulty (in) doing sth.中的 difficulty可数吗