difficulty,trouble可不可数啊?有difficulties吗?

difficulty,trouble可不可数啊?有difficulties吗? trouble可不可数 matter.trouble.problem.difficulty可数,不可数 difficulty,trouble,problem,quesfior的区别 difficulty problem trouble区别还有哪个可数 trouble 可不可数?请举例说明理由、、 have difficulty in doing sth .have trouble in doing sth when you meet difficulty or trouble,what will you have difficulty 搭配可不可以说have difficulty when doing sth.?为什么 trouble 可不可数?是不是有时候可数有时候不可数？ trouble 可不可数?a lot of trouble要不要加s? I have some problems/difficulty/trouble to work out the problem.(改错） When you meet difficulty or trouble,what will you do?回答 have trouble doing和have difficulty in doing有区别吗? I have __________(困难) working out the math problem.用trouble还是difficulty? 做某事有问题problem后面加不加s?如果换成trouble或difficulty呢? run into trouble 和have trouble with 和have trouble doing sth和have difficulty in doing这四个一样的意思吗 分别用他们造句 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