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判断语法正误She found it difficult to convince him.如果改成She found d

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判断语法正误
She found it difficult to convince him.
如果改成She found difficult to convince him.
it 在本句中是形式宾语,真正的宾语是不定式to convince him.
改成后面说的不对
再问: 为什么不对?
再答: She found to convince him difficult.
再问: 应该是 she found to convince him is difficult?
再答: She found (to convince him) difficult. 主 谓 宾 宾补 She found (that it is difficult to convince him). 主 谓 宾从(that可省,宾从中 it 是形式主语,真正的主语是不定式to convince him) She found (that可省) to convince him is difficult. 带不带is决定了这是一个简单句还是复合句 没有is,就是一个简单句, 不定式作宾语,difficult是宾语补足语 有is,就是一个主从复合句,found带一个宾语从句,不定式作宾语从句的主语
再问: 也就是说,也可以加IS,但是前提是省略了that,是吗。 虽然结构不同了,但是意思是一样的,是吗.
再答: 对