问题: 请问这个英文句子是什么意思?
to solve the problems present and future is it necessary to understand the past?
解答:
换句话说吧 Is it necessary to understand the past to solve the problems present and future?
为了解决现在,将来的问题,了解过去是有必要的吗?
这是用的动词不定式来解决头重脚轻的问题,
to solve the problems present and future is it necessary to understand the past?
to solve the problems present and future在这里是做目地状语
it 是形式主语,真正的主语是to 引导的动词不定式to understand the past 。
1,it 's+形容词 +to +do +sth
2,it 's+形容词 +for +sb+ to+ do+ sth
3,it 's+形容词/名词 +that +完整的句子
这三种it引导的形式主语句型是最常见的.
1,2真正的主语都是不定式to后面的句子,
3,是that后面整个句子是主语
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