have difficulty on sth对吗

have difficulty on sth对吗 have difficulty doing sth have difficulty with sth 对么 have difficulty in doing 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 关于have difficulty in doing sth 变形 用have difficulty in doing sth 造句 have difficulties/difficulty in doing sth? have difficulty in doing sth .have trouble in doing sth 是have difficulty doing sth还是have difficult doing sth? have difficulty in sth和have difficulty with sth 一样么?