537　It takes (sb.)+时间名词+to do sth.

　这种结构意为“做某事要花（某人）多少时间”，take 意为“占用（时间），花费（时间）”；这种结构中的it为形式主语，代替后面的真正主语to do sth.。注意，take 表示“占用（时间），花费（时间）”时，不可用指人的名词或代词作主语。

It takes (me) ten minutes to get to school from here. 从这里到学校要花（我）10分钟。

It will take (us) five days to finish the work. 完成这项工作要用（我们）5天。

It didn't take Linda very long to work out the problem. 琳达没费多长时间就解决了那个问题。

步行到那座小城只花了学生们一个半小时 。

It only took the students an hour and a half to walk to the town. （正）

The students only took an hour and a half to walk to the town. （误）

提示

①这个句型可同“人+spend+时间名词+on sth./doing sth.”相互转换。

It took him an hour to do his homework. 做家庭作业花了他一个小时。（it作主语）

He spent an hour on his homework/doing his homework. （人作主语）

②这种结构中也可用其他名词。

It takes a noble man to do that. 只有高尚的人才会那样做。

It takes great determination and perseverance to do so much in such a short life. 在这样短暂的一生中取得这么多成就需要巨大的决心和毅力。