Question

it做形式主语的用法总结

Answer 1

1、指代性it一般是指人称代词it，it作人称代词时可指代事物、动物、婴儿、未知的人或一件事。

2、不定式作主语，It's my pleasure (to help you).

3、it做先行词。

4、it做形式宾语。

5、引导强调句的it。

1.It+be+形容词+主语从句，如：It is uncertain whether he can come to Jenny’s birthday party or not.

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.

3.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 16 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.