It is diffcult for him to do it 谓语是is diffcult吗 那for只是介词吗
问题描述:
It is diffcult for him to do it 谓语是is diffcult吗 那for只是介词吗
答
It(形式主语) is (谓语) diffcult(表语,宾语) for him to do it (真正的主语)。
答
to do it 是整个句子的真正主语, 它被句首的It代替了, 句首的It是个形式主语,is difficult 是句子的谓语, 属于系表结构。,for是个介词,
答
谓语动词是系动词is for在这里是介词
答
is 是谓语
答
It 是形式主语
答
谓语?应该是do it的do
for应该是介词
答
本句子是遵循了英语中的常用处理方法,避免头重脚轻。it 做形式主语,to do it 做真正的主语,谓语是is
如果要还原句子本来面目应该是to do it for him is diffcult,这样本来是没问题的,但是这样的话句子主语太长,谓语太短,所以就成加来it来改善
很多时候句子都是这种,它可以记忆为: it is +形容词+for sb to do sth
答
It is diffcult for him to do it.
此句完全正确,你说得也非常对!谓语是is diffcult,是系表结构做谓语;for是介词;
答
形式主语it
真正主语to do it
系动词is
表语difficult
状语for him