The book is difficult for you to understand.不定式表主动/被动?

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/15 04:06:53

The book is difficult for you to understand.不定式表主动/被动?
1、The book is difficult for you to understand.
2、I have a book to read.
上面2句中,不定式的用法有区别吗?我的看法为：
在1中,主语是 the book,所以不定式表被动；而2中,主语为 I,所以不定式表主动.我说的对吗?

1中这个句型,主语+be+形容词+to do sth.不定式作原因状语,用主动式表示被动.语法要求的.
2中这个句型,主语+have+sth+to do.to do 作sth的后置定语,要求用主动式表示被动.
两个都是固定句式.
再问：你的意思是两句都是“被动”。OK，那么，请说明2句中的“被动”是“被【谁】动”？
再答： 2句中book与read形成动宾关系至于你说被谁动是被主语（I）动了 1句中understand是修饰difficult的原因状语，是被for sb中的sb动就是you 有时这个句型中for sb会省略你说的被谁动就是指动作发出者就是逻辑主语 1句中是for sb 中的sb 为逻辑主语有时省略 2句中是主语为逻辑主语此句中如果主语不是动作发出者（逻辑主语）就要用被动式了

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