It's difficult for wild animals to hunt for their food in winter because of the weather.主句?从句

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It's difficult for wild animals to hunt for their food in winter because of the weather.主句?从句
It's difficult for wild animals to hunt for their food in winter because of the weather.主句?从句

It's difficult for wild animals to hunt for their food in winter because of the weather.主句?从句
如上所诉,整个是以it做形式主语,代替to hunt for their food ,
顺便说下,这里没有从句.(因为从句也是独立句子,至少要有主谓成分)
这里有的是to hunt for their food (动词不定式短语),
because of the weather(原因状语)
in winter (时间状语)
不要混淆短语和从句的概念

该句子不是主从复合句,所以无所谓主句,从句。该句型是用的不定式的复合结构(for wild animals to hunt for their food 作主语。it是形式主语 is difficult 是系表结构,because of the weahter 是介词短语作原因状语。

It 在这里做形式主语 代表着 后面的to hunt for… 不定式才是真正的主语 这是为了减轻句子头重脚轻的一个句型