it放在句首的三用法 it放在句首的三用法有哪些( 二 )


(2) It takes sb时间段to do sth. 某人做某事花了……时间
It takes years to master a new language. 要花多年的时间才能掌握一门新的语言 。
【说明】此句型可以有以下多变种变体:It took me an hour to write the letter. =The letter took me an hour (to write). =I took an hour to write the letter. 我写这封信花了一个小时 。

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