have difficulty 搭配可不可以说have difficulty when doing sth.?为什么

have difficulty 搭配可不可以说have difficulty when doing sth.?为什么 have trouble in doing have difficult in doing have problem in doing这三个固定搭配中trouble difficulty problem用加s 为什么这三个固定搭配中trouble difficulty problem用加s吗 为什么 have difficulty 后跟什么? have difficulty gainning have difficulty in 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 difficulty with sth 对么 .have some difficulty or difficulties? 用have difficulty doing 造句 difficulty,trouble可不可数啊?有difficulties吗? have difficulty on sth对吗是不是have difficulty in doing sth,have difficulty on sth have difficulty with sth中difficulty要不要遍复数? have some difficulty (in) doing sth.中的 difficulty可数吗 have some difficulties还是difficulty in have difficulties/difficulty in doing sth? 关于have difficulty in doing sth 变形 用have difficulty in doing sth 造句 have difficulty doing sth 还是have difficulties dohave difficulty doing sth 还是have difficulties doing sth