一、it作人称代词 在特定的环境中,it也可指人,如指婴儿、性别不详或身份不明的人。 e.g. The baby stopped crying as soon as it
saw the woman.
—Who is it?
—It’s me. 二、it作形式主语或形式宾语 it可以作形式主语或形式宾语而把真正的主语或宾语后置。 1. 用it作形式主语的主语从句结构 (1) It+系动词+形容词+that从句 It is necessary/important/surprising/strange +that从句,从句中谓语动词常用“should+动词原形”形式,且should可省略。 (2) It+系动词+名词+that从句 It is a pity/a shame/good news/a fact/an honour/a wonder/no wonder/our duty+that从句。 e.g. It’s no wonder that you’ve achieved so
much success.
(3) It+不及物动词+that从句 It seems/happened/turned out /occurs/ appears+that从句。 e.g. It happened that he was out when I called
on him. (4) It+系动词+过去分词+that从句 It is said/reported/announced/believed/ thought/well known/hoped/pointed out/ found out/suggested/ordered/advised/ requested/insisted/required/demanded+that从句。 e.g. It’s said that they have succeeded in
carrying out this experiment. 【注意】在“It is suggested/advised/ordered/ requested/insisted/required/demanded+that从句”结构中,从句要用虚拟语气,即谓语动词用“should+动词原形”,should可省略。 e.g. It is suggested that you (should) spend
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