用来表示物体的长(宽,高),如数词大于一,名词要用复数。例如:
It is 20 metres long from this end to that end. 从这端到那端有二十米长。
27.Its time for sb. to do sth. 是某人干某事的时候了
it是形式主语,真正的主语是动词不定式to do sth.。for sb./sth。是逻辑主语。例如:
Its time for the child to go to bed. 孩子该睡觉了。
比较下面两种结构:① Its time for + n. 例如: Its time for school。
②Its time to do sth. 例如: Its time to go to school. 我们该学习英语了。
28. It takes sb. some time to do sth. 花费某人多少时间做某事
it是形式主语,真正的主语是动词不定式to do sth.。例如:
It takes her fifteen minutes to walk to the bus stop from here. 从这儿走着到公交车站将花费她15分钟。
It took the old man three days to finish the work. 那个老人花了三天时间完成这项工作。
我上学坐公交车要花半个小时。
29. keep (on) doing sth. 一直坚持做某事
keep doing sth。一般用于静态动词。keep on doing sth。意为继续不停地做某事,一般用于动态动词,但二者的区别并不是很严格,有时可以互换。例如:
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