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代词it在高考中几乎历年以单选题的形式出现，在考试中占有重要地位。下面就它在高考中的考点加以总结归纳，希望对大家有所帮助。
一、it用作形式主语
1. 经常在look，seem，appear，happen，occur等动词之后，后面接that从句或者as if从句。
（1）It occurred to me that he had been in prison.
我突然想起他曾经蹲过监狱。
（2）It so happened that Jack had no money with him.
杰克碰巧没有带钱。
2. 用于if引导的虚拟条件句。
（1）If it had not been for the fact that my leg got injured，I might have passed the exam.
要不是我的腿受伤了，我可能早就通过考试了。
（2）If it were not for the fact that you were ill， I would ask you to do this r.
要不是你病了，我将要求你做这件事了。
二、It作形式宾语
1. 动词enjoy，like，dislike，love，hate，appreciate等词之后需要一个if 或when引导的从句时，此时先需要在动词后面接it。
I would appreciate it if you could help me.
如果你能帮我，我将不胜感激。
2. 动词+介词+it+that从句
Please see to it that you will bring enough money.
出门时带上足够的钱。
三、It用于强调句
1. Who was it that broke the window？
究竟是谁把窗户打碎了？
2. It was my physics teacher who（that） helped me a lot when I was in trouble.
正是我的物理老师在我处于困境时给了我很大帮助。
四、it在固定短语或者固定句型中的用法
1. Don’t worry，he will make it.
别担心，他会成功的。
2. As it was，we didn’t finish the homework at all.
事实上，我们根本没有完成作业。
3. Take it easy，everything will be OK.
不要紧张，一切会好的。
4. It can’t be helped if you don’t follow my advice.
如果你不听我的建议那就没办法。
5. It is no use discussing with him.
跟他讨论没有用。
6. It was the last time that I had called him.
这是我最后一次给他打电话。
五、用于状语从句，指时间。
1. It is ten years since he graduated from university.
他从大学毕业已经有10年了
2. It was not long before she joined the army.
没隔多久她就参军了。
3. It was midnight when we got home.
我们到家已经是午夜了。
一、it用作形式主语
1. 经常在look，seem，appear，happen，occur等动词之后，后面接that从句或者as if从句。
（1）It occurred to me that he had been in prison.
我突然想起他曾经蹲过监狱。
（2）It so happened that Jack had no money with him.
杰克碰巧没有带钱。
2. 用于if引导的虚拟条件句。
（1）If it had not been for the fact that my leg got injured，I might have passed the exam.
要不是我的腿受伤了，我可能早就通过考试了。
（2）If it were not for the fact that you were ill， I would ask you to do this r.
要不是你病了，我将要求你做这件事了。
二、It作形式宾语
1. 动词enjoy，like，dislike，love，hate，appreciate等词之后需要一个if 或when引导的从句时，此时先需要在动词后面接it。
I would appreciate it if you could help me.
如果你能帮我，我将不胜感激。
2. 动词+介词+it+that从句
Please see to it that you will bring enough money.
出门时带上足够的钱。
三、It用于强调句
1. Who was it that broke the window？
究竟是谁把窗户打碎了？
2. It was my physics teacher who（that） helped me a lot when I was in trouble.
正是我的物理老师在我处于困境时给了我很大帮助。
四、it在固定短语或者固定句型中的用法
1. Don’t worry，he will make it.
别担心，他会成功的。
2. As it was，we didn’t finish the homework at all.
事实上，我们根本没有完成作业。
3. Take it easy，everything will be OK.
不要紧张，一切会好的。
4. It can’t be helped if you don’t follow my advice.
如果你不听我的建议那就没办法。
5. It is no use discussing with him.
跟他讨论没有用。
6. It was the last time that I had called him.
这是我最后一次给他打电话。
五、用于状语从句，指时间。
1. It is ten years since he graduated from university.
他从大学毕业已经有10年了
2. It was not long before she joined the army.
没隔多久她就参军了。
3. It was midnight when we got home.
我们到家已经是午夜了。