很难的英文：
be difficult to ;be hard put to it ;be hard to ;difficult of ;have a hard tiem

参考例句：

Hardly approve
很难赞成

It is very difficult to persuade the imperislists to disarm.
说服帝国主义裁军是很难的。

a difficult customer
很难应付的客人

Smuggling is hard to root away.
走私很难根绝。

Chinese character is so hard to remember.
汉字很难记住。

It is very difficult to translate this sentence literally.
这句话很难直译。

She's usually pretty unapproachable.
她一般很难接近。

These potatoes don't peel easily.
这些土豆的皮很难剥。

The old authoritarian structure of the family dies hard
旧的专制家庭结构很难革除。

The music of Irving Berlin is scarcely comparable to that of Beethoven.
欧文·伯林的音乐很难与贝多芬的媲美。

difficult是什么意思：
adj. 困难的；执拗的；不易相处的

The exercise is that difficult!
练习题那么难！

You must admit the task to be difficult [ that the task is difficult ].
你应当承认这项任务是艰巨的。

You must admit the task to be difficult [that the task is difficult].
你必须承认这项任务是困难的。

hard是什么意思：
adj. 硬的，坚固的；困难的；有力的；冷酷无情的
adv. 努力地；困难地；严重地，猛烈地

It is hard to conclude.
这很难断定。

It is blowing hard.
风刮得很大。

It was sleeting hard.
雨雪霏霏。

put是什么意思：
v. 放，置，使处于；表达，说明

put a crimp into
妨碍|束缚

Put on the screw
施加压力

strike [ put on ] a pose of
装出...面貌[样子]