It is necessary for sb to do sth的改写

It’s necessary for us to stay at home.

=For us to stay at home is necessary.

= To stay at home is necessary for us.

=It’s necessary that we (should) stay at home.

我的改写都正确吗？

都正确。

For us to stay at home is necessary.不定式复合结构直接放在主语的位置。

To stay at home is necessary for us.不定式作主语，for us作表示对象的状语。

It’s necessary that we (should) stay at home. It为形式主语，that we (should) stay at home为真正的主语。

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擅长：英语考试 | 采纳率 54% | 回答于 1秒前

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