本文中,小编为大家整理了形式主语it的5种用法,快来看看吧!
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.
5.It+be+形容词+for sb.)+动词不定式这类句型常用形容词easy,difficult,hard,important,possible,wise等作表语,有时候为了强调不定式动作的执行者,常在不定式前加for sb,如:It’s necessary for the young to master two foreign language. It is unwise to give the children whatever they want. 这类形容词有:easy, difficult, hard, important, possible,wise