it is _waste of time for young men to devote themselves to palying computer games on the internet .为什么——里要填 "a"阿?

问题描述:

it is _waste of time for young men to devote themselves to palying computer games on the internet .
为什么——里要填 "a"阿?

这句话的IT是指代后面的to devote themselves to palying computer games on the internet,
waste指的是这件事,所以要用a来表示这件事。

a waste of time固定搭配 浪费时间

It is 【a】_waste of time for young men to devote themselves to playing computer games on the Internet .
句意:对于年轻人来说,将时间投入到玩网略游戏上是浪费时间/是一种时间的浪费。
结合句意可见,It is a waste a time for sb to do sth 表示“对某人来说做某事是【一种时间的浪费】。即就是说,waste 作为【浪费】是不可数名词;但是当表示【一种...的浪费】时,由抽象名词转化为具体名词——【抽象名词具体化】,就【演化为可数名词】,因此,就可以直接加冠词。再如:
Failure is the mother of success.
We have made the 2008 Beijing Olympic Games【 a great success】.
This dictionary can be【 a help 】to your self-study.
类似结构还有:have a good knowledge of 精通......
祝你开心如意!O(∩_∩)O~~

a waste of 表示浪费…
是固定搭配
例如:How many gifts are basically a waste of money?
有多少礼物基本上只是浪费金钱?

这是一个固定的句型
it is a waste of time for somebody to do sth,
这个最好是要记住,因为很常用