关于it 做形式主语句子的几个问题（1）为什么有的时候是It be necessary for sb to do sth.有时候却用It be necessary of sb to do sth.差别在哪里?比如：It is very difficult for me to do it.和It was very kind of him to pa

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关于it 做形式主语句子的几个问题（1）为什么有的时候是It be necessary for sb to do sth.有时候却用It be necessary of sb to do sth.差别在哪里?比如：It is very difficult for me to do it.和It was very kind of him to pa

关于it 做形式主语句子的几个问题（1）为什么有的时候是It be necessary for sb to do sth.有时候却用It be necessary of sb to do sth.差别在哪里?比如：It is very difficult for me to do it.和It was very kind of him to pa
关于it 做形式主语句子的几个问题
（1）为什么有的时候是It be necessary for sb to do sth.有时候却用It be necessary of sb to do sth.差别在哪里?比如：
It is very difficult for me to do it.和
It was very kind of him to pay the bill.
（2）再看下这个句子:
You ought to have locked the door.That was very careless.
变成it引导的形式主语句子：It was very careless of you not to have locked the door.为什么不改成to have not locked the door?

关于it 做形式主语句子的几个问题（1）为什么有的时候是It be necessary for sb to do sth.有时候却用It be necessary of sb to do sth.差别在哪里?比如：It is very difficult for me to do it.和It was very kind of him to pa
for讲的是行为动作本身的性质
而OF 是修饰做该行为的 人的 性质

如果说做某事对某人来说是怎么样的用：for
当说某人的性格特性等用： of

关于it 做形式主语句子的几个问题（1）为什么有的时候是It be adj.for sb.to do sth.有时候却用It be adj.of sb.to do sth.差别在哪里?比如：It is very difficult for me to do it.和 It was very kind of him to pay the bill. 关于it 做形式主语句子的几个问题（1）为什么有的时候是It be necessary for sb to do sth.有时候却用It be necessary of sb to do sth.差别在哪里?比如：It is very difficult for me to do it.和It was very kind of him to pa It做形式主语的句子5句,英语的 it做形式主语的句子如何回答 关于动名词短语作主语的几个问题动名词短语作主语时：1、可以用it作形式主语吗?（除it's no use 等固定结构）2、可以在作主语的动名词短语前带逻辑主语吗?可以的话举几个例子来看看？不 it 做形式主语时、句子是主语从句么? 在主语从句中,that引导的句子往往可以用it 做形式主语,那么what引导的可以用it做形式主语么/ 怎样很快判定it是形式主语(好的追加分)是不是只要前有it后又有不定式的句子都是it做形式主语 关于It（it）做先行宾语与形式主语的区别It 做形式主语,我懂.但是,It 做先行宾语,请赐教!形式主语：It is an important thing to learn English well.其中,It 后面会出现is ,我懂先行宾语：He thought it easy to it做形式主语造句 It turns out that we will have a holiday 句子中 IT 做的是什么 是形式主语么 形式主语it所引导的句子结构? it 做形式主语和形式宾语的句子可以进行互换吗,如：I find___ important to learn English.填it 还是it's 关于中秋节的英语造句4句!1 用倒装句形式2 用强调句形式（it is...that...)3 用ing形式开头做主语4 用ing形式开头做宾语 it做形式主语,后面紧跟的动词加s? to know what to do is wisdom.变成由it做形式主语的句子怎么变? 分析一下句子中的it：I can't help it if …I can't help it if he is always late.it做的是形式主语还是形式宾语，后面的是主语还是宾语？ it 做形式主语 不定式做真正主语 不定式符号to可以省略的情况