③当系表结构后接有if或when引导状语从句时,通常在系表结构前用形式主语it表示说话人对某情况的看法。 It would be great if you could do me a favor.你要是能帮我个忙就太好了。
④it用于其他固定句型,如if it were not for…(要不是因为……), it’s time that…(该……了)等。
形式宾语 ①用在“动词+it+宾补+不定式(短语)、动名词(短语)或从句”中(常见动词:think, make, find, consider, feel, suppose等:宾补为形容词或名词)。 He has made it a rule to set aside half an hour every day for some exercise.他习惯了每天锻炼半小时。
I found it surprising that most employees were absent.我惊讶地发现,大多数员工都不在场。
②介词后面不能直接跟that从句作宾语,此时就在介词后面用it作形式宾语,而把真正的宾语放在句尾。 You may depend on it that he’ll turn up in time.你可以相信他会按时赶到的。
We owe it to you that there wasn’t a serious accident.多亏了你才没有发生严重事故。’s attention that; owe it to sb. that; leave it to sb. that; take it for granted that; keep it in mind that等。 I owe it to you that I finished all my work on time.多亏有你我才及时完成了工作。
3.it用于强调结构it be…that:it is (was) +强调部分+that / who+其他(题干是现在时就用it is…that,题干为过去时则用it was…that。
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