中考英语常考句型：it句型
中考英语中，it句型是高频考点，主要分为形式主语、形式宾语和非人称代词用法三大类。以下是具体解析：
一、it作形式主语
1、it + be + 形容词 + (for/of sb.) + 不定式
①形容词描述事情性质用“for sb.”，如：
It is necessary for students to study hard.
对学生们来说有努力学习是有必要的。
It’s important for us to have a good knowledge of English.对我们来说，学好英语很重要。
②形容词描述人物品质用“of sb.”，如：
It is kind of you to help me.你帮助我真是太好了。
I feel it foolish of him to believe such a man.我觉得他相信这样的人是愚蠢的。
It is very good of you to teach me English. 你教我英语真是太好了。
2、it + be + 名词 + 不定式/从句 。如：
It is our duty to protect the environment. 保护环境是我们的职责。
It is a fact that he has left the city.
3、it + 不及物动词 + 不定式/从句 。如：
It seems difficult to finish the work in time.
It happened that I was out when he called.
4、it + be + 过去分词 + 从句 。如：
It is reported that he will come back soon. 据报道，他很快就会回来。
It has been decided that we will hold a meeting.我们已决定举行一次会议。
二、it作形式宾语当不定式、动名词或从句作宾语且有宾语补足语时，用it作形式宾语，如：
I think it important to learn English well. 我认为学好英语很重要。
She found it difficult to solve the problem. 她发现很难解决这个问题。
三、it作非人称代词指，时间、天气、地点等 。
It is 8 o'clock now. 现在是8点钟。
It is sunny today. 今天阳光明媚。
It is very noisy here.这里很吵。
四、指代未知性别的人或事物
1、Who is knocking at the door?谁在敲门？
It must be my brother. 那一定是我弟弟。
2、Is it a boy or a girl?是男孩还是女孩？
五、高频考点示例
1、形式主语：
It is necessary for us to exercise every day. 我们有必要每天锻炼。
2、形式宾语：
I find it interesting to read books.
我发现读书很有趣。
I find the door open/closed.
我发现门开/关着
I find our bags filled with/full of presents. 我发现我们的包装满了礼物
3、非人称代词：
It is raining heavily outside.
外面正下着大雨。
