had
had difficulty 什么形式？
difficulty 什么形式？
have difficulty (in) doing sth 做某事有困难。
have difficulty in doing sth结构中，difficulty通常用单数形式，介词in有时可以省略，构成have difficulty doing sth固定结构。如：
I had difficulty carrying out the plan.
我执行这项计划有困难。
difficulty
读音：英［?d?f?k?lti]美［?d?f?k?lti]
释义：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
difficult什么时候用复数，什么时候用单数？
difficult是形容词,困难的,不论单复数,名词是,difficulty,可数名词,复数形式difficulties.
希望我的回答对你有帮助哦
difficulty，形容词复数？
difficult adj. 困难的；不随和的；执拗的；
复数形式是difficulties
例句：
The exam was pretty difficult.
这场考试相当难。
Hes a difficult man to please.
他是个难以取悦的人。
Its difficult to tell them apart.
很难把他们区分开来。 扩展资料
It was rather a difficult question.
这真是个难题。
She made life very difficult for me.
她使我的生活变得很艰难。
We are faced with a difficult choice.
我们面临着困难的抉择。
She#39s faced with a difficult decision.
她眼前有一项难作的决定。
Is it difficult being a single mother?
当单身母亲难吗？