Tom might change his mind. Р (看来汤姆可能会改变主意。)Р ⑤若句子是疑问形式,就只能用it作形式主语。Р e.g. Does it matter much that they won’e tomorrow? Р (他们明天不来很重要吗?)Р Is it true that he will go abroad next week? Р (他下周出国是真的吗?)Р ⑥ It + takes + (sb.) + some time + to do sth.Р 这是一个表示“(某人)花多少时间干某事”的句型,其中it是形式主语,代替后面的不定式(to do sth.),句型中的sb.也可以省略。Р e.g. It took me some time to read the reading materials.Р (我花了一些时间才读完那段阅读材料。)Р It took him fourteen hours to go to New Zealand from Shanghai by plane.Р (从上海乘飞机去新西兰花了他14小时。)Р How long does it take you to go to Beijing from Qingdao by train? Р (从青岛坐火车到北京一般要花多久时间?)Р I am not sure, but I think it takes at least nine hours to get there.Р (我不能肯定,但估计至少要九个钟头才能到那儿。)Р 二、It 用作形式宾语Р 当不定式(短语)、动名词(短语)或从句在某个句子中作宾语时,为保持句子结构平衡,避免句式结构的混乱,常用it作形式宾语,而将真正的宾语放在句尾。此时it仍只起先行引导作用,本身无词义。Р 下列四种情况须用it 作形式宾语:
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