I think it difficult to learn English well句中为什么用it?

问题描述:

I think it difficult to learn English well句中为什么用it?

这是形式主语
it是think引导的从句中的形式主语,它指代的是to learn English well的内容。如果把句子写全是I think that it is difficult to learn english well

形式宾语
真正的宾语是to learn English well

形式宾语 代指后面的to learn English well 避免头重脚轻而设置的
你可以看看高1的 it用法与主谓一致

形式宾语 代替to learn English well 当真正的宾语过长时,为使句子美观平衡 常常用it做形式宾语