利用
在SAT的备考过程中，大量的真题练习是必不可少的，然而在真题中我们也需要进行归纳总结，才可以不断地提高自己。今天小编给大家带来的是在真题涉及到的语法中it的用法介绍，希望各位考生能够得到一定的帮助。
一、考查 it 用作形式主语的用法当不定式、动名词、从句等用作主语时，为避免头重脚轻，通常在句首使用形式主语it，而把真正的主语放在句子末尾。
如：It's no good sitting up too late. 熬夜没有好处。
It is quite clear that he has read the book. 很显然，他读过这本书。
It doesn't matter what he says. 他说什么没关系。
【特别提醒】注意it用作形式主语的三类特殊句式：
1.用作动词look, seem, appear, happen, occur, follow等的主语(后接that从句或as if从句)。如：It seems that he knows everything. 他好像什么都知道。
It (so) happened that I had no money with me. 碰巧我没带钱。
2.当系表结构后接有if 或when引出的状语从句时，通常在系表结构前使用形式主语表示说话人对某情况的看法。如：It was a great surprise to me when he did a thing like that. 他这样做使我很吃惊。所以说还是建议大家一定要多做一些
It would be a tragedy if anything went wrong. 如果出了什么事就是一个悲剧。
3.用于if it were not for… / if it hadn't been for…(若不是因为)。如：If it hadn't been for the freezing wind they could have reached the injured man in time. 要不是有刺骨的寒风，他们就及时赶到伤员身边了。
二、考查 it 用作形式宾语的用法当不定式、动名词、从句等用作宾语且其后跟有宾语补足语时，就应在宾语补足语前使用形式宾语，而将真正的宾语移至句末：We found it difficult to persuade her. 我们发现很难说服她。
He makes it a rule to get up before dawn. 他习惯于天亮前起床。
I think it very strange that he goes out walking almost every night. 我认为他几乎每晚都出去散步是很奇怪的。
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