解释一个英语句子的相关语法知识点

Question

It can be seen that there is no difficulty in the world we cannot overcome.
可以看出，世上没有克服不了的困难。

Answer 1

It can be seen它可以被看出/看到，被动语态

that there is no difficulty in the world we cannot overcome

这是that引导的从句，从句中出现了there is句型，后面用no作否定，no 后面difficulty用单数
后面又出现了we cannot overcome，这个是that引导的从句中的从句，也就是说这句话是句子套句子，that引导宾语从句，即that之后的这一大串都是seen的宾语，而在这个宾语句子里面通过对difficulty进行限定修饰的we cannot overcome就是宾语从句里的定语从句

Answer 2

It can be seen that ＋句子 其实是一种固定用法，不用去纠结这个，记住就行了。。。类似的还有it is said that/it is known that。。。等等

后面的就是宾语从句了，there be 句型楼主晓得噻。。。there is no difficulty in the world ，世上没有困难。

然后下来又接了个定于从句。。。我把顺序给你调下你就更清楚了。。
It can be seen that there is no difficulty （that）we cannot overcome in the world .句子把that给省略了哈。。。。。

Answer 3

can后加动词原形，be done为被动语态，there be句型表某地有某物意思，difficulty在此为不可数名词，所以no后用名词单数

Answer 4

It做形式宾语，there到结尾是宾语从句作宾语，there be句型
we到结尾作定语从句修饰difficulty