Question

have problems in doing 还是 have problem in doing 还是 have a problem in doing 有解释的出处么？

词组中间的名词用difficulty trouble可以替换么？替换的这两个词也都可以用复数么？查了好多字典都没找到确定的答案 求高手帮忙

Answer 1

这几个都可以互换，其实最基本的说法还是have difficulty in doing。应该不能随意变换形式，都是原型。