difficulty没有动词的形式
difficult[ˈdifikəlt]
形容词 adj.
1、困难的， 难懂的，费力的；难做的；难解的
Things become increasingly difficult.
事情变得日益困难.
It is difficult for me to teach.
教书对于我是件不容易的事.
2、不易相处的， 难满足的，难以讨好的；难以取悦的；不愿帮助的
She was the most difficult customer the salesman had to deal with that day.
她是这个售货员那天所遇到的最难应付的一位顾客.
3、问题很多的；充满艰难困苦的；麻烦的
difficulty
名词 n.
1、困难； 难度
She has difficulty breathing.
她呼吸有困难.
2、难事； 麻烦
Where'；s the difficulty?
困难在哪儿
