UNIT 6 Section Ⅲ Grammar(1)-【金版新学案】2025-2026学年新教材高二英语选择性必修第二册同步课堂高效讲义教师用书word（北师大版）

语法串烧

我的发现

It① was a sunny day.Peter decided to go for a walk to the park which was two miles away.It② was so comfortable to walk on the street.But unfortunately it began to rain suddenly.Without an umbrella in his hand，he found it③ hard to go on his journey.He had no alternative but to give up his plan.On the way home he couldn’t help complaining it④ was the terrible weather that ruined his day.What a pity it⑤ was！

1.it作人称代词，如⑤；

2.作非人称代词，表示时间、距离、天气等，如①；

3.在句中作形式主语，如②；或形式宾语，如③；

4.用在强调句中，如④。

用法

例句

指代前文已提及的事物，以避免重复，可用作句子的主语或宾语。

My friend offered me an amusing comic yesterday，and I like it very much.

我朋友昨天给了我一本有趣的漫画书，我非常喜欢它。

指代性别不明的婴儿或未知的人(由于某种原因而不知对方是谁)。

The comedian has given birth to a baby recently and it is very beautiful.

这位喜剧演员最近生了个孩子，很漂亮。

—Who is waiting for you at the bus stop？

——谁正在公共汽车站等着你？

—I have no idea.It may be my brother.

——我不知道，可能是我的哥哥。

指时间、天气、距

According to the weather report，it’s going to rain today.

离、自然现象、环境等。

据天气预报，今天有雨。

It is five kilometres to the town from this village.

从这个村庄到城镇有五千米。

It was an extremely cold winter’s evening and freezing fog hung in the air.

那是一个极其寒冷的冬夜，空气中弥漫着冰雾。

当从句、动词不定式短语或动词-ing形式短语作主语时，为了避免头重脚轻，往往把真正的主语放在谓语之后，再用it作形式主语来指代后面的真正主语。常用it作形式主语的句型有：

It＋be＋形容词＋主语从句。该句型中常用的形容词有necessary，strange，likely，uncertain，natural等。

It is necessary that the problem should be discussed at once.立刻讨论这个问题很有必要。

It＋be＋名词(词组)＋主语从句。该句型中常用的名词(词组)有a fact，a pity，a shame，an honour，no wonder等。

It’s a pity that you missed the exciting football match！

你错过了那场令人兴奋的足球比赛，真遗憾！

It＋be＋过去分词＋主语从句。该句型中常用的过去分词有announced，thought，hoped，decided，reported，said，known等。

It is said that there will be lots of prizes for the winners，including notebooks，pens and dictionaries.据说获胜者会得到很多奖品，包括笔记本、钢笔和词典。

It is not yet decided who will perform the operation on the patient.谁给病人

做手术还没有决定下来。