difficulty的用法有：名词或复数，接in doing sth，接of doing sth。
1、 关于是否用作可数名词和是否用复数形式：
(1) 表示抽象意义的“困难”，是不可数名词。如：
Bad planning will lead to difficulty later.
计划不周会给以后带来困难。
Refer to your dictionary in case of difficulty.
如果遇到难题，请参考你的字典。
(2) 表示具体意义的“困难”（如难事、难点、难题等），是可数名词。如：
Here is a difficulty for us to get over.
这儿有一个困难要我们克服。
He met with many difficulties when travelling.
他在旅行进遇到过不少伤脑筋的事。
(3) 在某些词组中是不可数名词（只用单数），如with difficulty（困难地），without difficulty（容易地）；而在某些词组中又是可数名词（且通常要用复数形式），如make difficulties（刁难），under difficulties（在困难条件下）。
(4) 在某些词组中可用作可数名词或不可数名词，有时意义相同，如make no difficulty=make no difficulties（无异议，不反对），有时意义不同，如be in difficulty（有困难），be in difficulties（手头拮据）。
2、表示“做某事有困难”，其后不接 to do sth，而接 (in) doing sth，其中的 in 含有 while之意，在口语中通常可以省略；由于这样用的 difficulty 意思比较抽象，因此不可数，不用复数形式，也不连用不定冠词。如：
I had difficulty understanding the poems.
这些诗我感到很难理解。
I found great difficulty (in) doing the work.
做这工作我觉得很吃力。
There is much difficulty in finding his office.
没费什么劲就找到了他的办公室。
若是后接名词，则通常用介词with。如：
I’m having difficulty with my travel arrangements.
我安排旅行遇到了困难。
Some people had difficulty with the lecture, but most understood.
有些人听讲有困难，但大部分人听懂了。
另外，有时也可后接 about (doing) sth，其中的 about 隐含有“关于”之意。如：
There oughtn’t to have been any difficulty about it.
此事本不应有什么困难。
There shouldn’t be any difficulty about getting you a visa.
给你弄个签证不会有什么困难吧。
3、表示“做某事的困难”，其后可接 of doing sth。如：
He tried to explain to me the difficulty of learning to cook from books.
他向我解释照着书本学习烹饪的困难。
Advance learning allows you to adapt the difficulty of lessons ahead and deepen understanding, and even you can also have wider ideas when doing some of the problems.
超前学习可以让你提早适应课业的难度，加深理解，甚至是在做到一些难题时，也可以有更宽的思路。
He tried to explain to me the difficulty of learning to cook from books.
他向我解释照着书本学习烹饪的困难。
One of the annoyances of working here is the difficulty of parking near the office.
在这里工作有一件伤脑筋的事，就是在办公处附近很难停车。
例句：
1、She had real difficulty telling the truth because she liked to embellish things.
她喜欢添枝加叶，所以很难讲真话。
2、It was overgrown with brambles, so that I had difficulty making any progress.
这里布满了荆棘，所以我前进很困难。
3、He knew what he liked but had difficulty envisaging it.
他知道自己喜欢什么，但又想像不出。
4、The gig was pulled at the first sign of difficulty.
刚出现一点小困难，特约演奏会就取消了。
5、If he saw a trucker in difficulty, he would just bog in and give a hand.
如果他看到一个货运汽车司机有困难的话，他会非常热情地给予帮助。
6、He has enough backbone to see us through this difficulty.
他有足够的毅力帮我们渡过这个难关。
7、They picked up their friendship without the slightest difficulty.
他们毫无困难地接续了他们的友谊。
8、The nurse talked to me in a patois that even Italians would have had difficulty in understanding.
那个护士和我说话所用的方言即便是意大利人也很难听懂。
9、The king, with some difficulty, composed this difference.
国王费了点心思把分歧解决了。
10、I was having difficulty in keeping awake .
我那时困得不得了。
difficulty的用法如下：
difficulty后常接“of+n./v-ing”或“in+v-ing”作定语,in有时可省去,不用动词不定式。
n. 困难; 难题; 难事; 困境; 艰难; 费劲; 辛苦; 困难程度; 难度。
[例句]They showed great perseverance in the face of difficulty.
他们面对困难表现了坚强的毅力。
[其他] 复数：difficulties。
1、difficulty用作不可数名词，表示泛指的笼统困难，意为"困难、艰难",常用在以下句型中。
have no/find(some,any,much) difficulty with sth./(in) doing sth.
There is no (some,any,much) difficulty (in) doing sth.
2、difficulty用作可数名词,表示某种具体的困难,意为"难事,难点,困境,难处"。
In face of so many difficulties,we never appeared to be afraid.
相关句子：
1、Young children have difficulty grasping the finality of death.
小孩子很难理解死亡的不可改变性。
2、I had some difficulty at first recalling why we were there.
刚开始回想我们为什么会在那儿时我有些费劲。
3、Aron couldn't speak Polish. I made myself understood with difficulty.
阿伦不会说波兰语，我为了让他明白我的话很是费了一番力气。
4、He had always had difficulty leaving questions unanswered.
如果有问题空着没有作答，他总会觉得不自在。
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