单数、复数都是可以的,但是表示的意思不同:
have some difficulty 表示“有某种困难”
have some difficulties 表示“有一些困难”
difficulty表示下面意思时是不可数的:
困难,艰难:
I had no difficulty in getting in touch with him.
我和他取得联系没有什么困难.
常用句型:
have no/find (some,any,much) difficulty with sth./(in) doing sth.
There is no (some,any,much) difficulty (in) doing sth.
I had no difficulty in learning English.
There was much difficulty (in) explaining it to him.
difficulty 在下面几种意思时是可数的:
难事,难处,难题
There are a lot of difficulties that have to be overcome.
有许多困难必须克服.
争论
Labor difficulties grew.
劳工纠纷加剧.
difficulty在以下意思时本身就是复数形式:
(尤指财务上的)困境;危难
The new government is in financial difficulties.
新政府财政困难.
异议,反对
He keeps raising difficulties over the new project.
他对这项新工程不断地横加阻挠.