江苏省无锡新领航教育咨询有限公司高中英语《It作形式主语》练习_高考复习指南

　　2. It + be + 名词词组+ 主语从句，这类名词有：a fact, a pity, a shame, an honour，a question 等，如：

　　It’s a pity that you missed the exciting football match. It remains a question whether he will come or not.

　　It + be + 过去分词 + 主语从句，这类过去分词有：announced, believed, expected, hoped, decided, reported, said, shown 等，如：

　　It is reported that people were killed in the earthquake.

　　It is not decided who will give the operation to the patient.

　　4. It + 不及物动词(seem, appear, happen 等) + 主语从句这类不及物动词有：appear,

　　happen, seem 等，如：

　　It seemed that he didn’t tell the truth.

　　It happened that I was out when he called.

　　It + be + 名词或形容词 + 动名词，这类名词和形容词常常是： good, no good, no use,

　　a waste of, useless, senseless 等，如：

　　It’s a waste of time talking to her any more. It is no use arguing about the matter with him.

　　It + take ( sb. )+ 时间（金钱）+ 动词不定式，如：时间（金钱）动词不定式，

　　It took the workers almost three years to finish building the dam.

　　It will take a whole day to get to the top of the mountain on foot.

　　实战演练：

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