have difficulty (in)doing/with sth., 做某事有困难;其中difficulty是不可数名词;可换为trouble ; problem; fun等。
(1) difficulty (通常作复数) 难事,难点,难题;She met with many difficulties when travelling.旅游时她遇到了很多困难。
(2) 在以下句型中,difficulty是不可数名词,不能用复数形式。
have (some) difficulty (in) doing sth.干某事有困难;
there is (some) difficulty (in) doing sth. 在某事上有困难;
做某事有困难