SAT语法解析之it用法.

　　SAT语法令很多同学都头疼，大家需要了解SAT语法考点的内容有助于大家分清重点与次重点。下面小编就来给大家介绍一下SAT语法真题中有关于it的用法。

　　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&aposs 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&apost 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。

　　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&apost been for…(若不是因为)。如：If it hadn&apost 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 bore 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。

　　【特别提醒】注意it用作形式宾语的三类特殊句式：1. 动词+it+if / when从句当enjoy, like, dislike, love, hate, prer, appreciate等动词后需要接一个if或when引导的从句时，此时必须要先在动词后接it作形式宾语。如：She won&apost like it if you arrive late. 她不喜欢你迟到。

　　He hates it when people use his bike. 他讨厌别人用他的自行车。

　　I&aposd prer it if I didn&apost have to do so much work. 要是我不必做那么多工作，那就太好了。

　　I would appreciate it very much if you would help me with it. 如果你能帮助我做这事，我会十分感激。

　　2. 动词+介词+it+that从句能用于此句型的主要有三个动词，即depend on, answer for, see to.如：You may depend on it that he will turn up in time. 你可以相信他会及时赶到的。

　　I can&apost answer for it that the boy is honest. 我不能保证这个男孩是诚实的。

　　I&aposll see to it that all these letters will be sent to the post bore twelve. 我将注意让所有的信件在12点以前送到邮局。

　　以上就是小编今天跟大家介绍的SAT语法真题中有关于it的用法，希望同学们能够掌握这些SAT语法考点。多多练习。