短文改错中This is necessary for the students to get rid off the bad habit 中的 This 为什么改成It

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短文改错中This is necessary for the students to get rid off the bad habit 中的 This 为什么改成It

短文改错中This is necessary for the students to get rid off the bad habit 中的 This 为什么改成It
短文改错中This is necessary for the students to get rid off the bad habit 中的 This 为什么改成It

短文改错中This is necessary for the students to get rid off the bad habit 中的 This 为什么改成It
形式主语,真正的主语是to get rid off the bad habit,形式主语只能用It,不用别的词.

It is necessary for 为固定短语表示有必要干什么！

It is necessary for sb to sth 某事对某人有必要
这是固定的句型啊

It is xxx to do sth. 做某事是有XXX
比如这边的 it is necessary to for sb to do sth. 对某人来说做某事是必要的。
固定用法

希望采纳

牵涉到语法。

It 作形式主语，真正主语为后面不定式to get rid....This 是没有“形式主语”这个功能的。

不过应该为get rid of.. (of 不是off)哦

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