赛尔号vip专属套装:It's adj. to..和It's adj. for..这两个结构都对吗?怎么区分?

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It's adj. to..和It's adj. for..这两个结构都对吗?怎么区分?都是什么意思啊?
to...有没有"对....来说"的意思啊

It's adj. to...中的to是助动词,后接动词原形构成谓语,作句子真正的主语.it是形式主语
eg. It's difficult to finish the task.
It's adj. for...中for是介词
eg. It's difficult for me.
还可以结合一下:It's adj. for sb. to do sth.
eg. It's difficult for me to finish the task.
for连接的是逻辑主语

这两个结构都对都对。
It's adj. to..做什么怎么样。
It's adj. for..对于什么(谁)怎么样。

1)to do
2)for sb to do

前者to后加do sth.后者for后加sb.

一般都比较for.of 的用法

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