雾都下的吃货
看你这话用在什么上下文环境。简单地说就是：not useful/not valuable；of no use/of no value；useless/valueless 放在句子里，你说“这东西没用、这事做了也没用”：It's useless.It's of no use.It doesn't help.你要说“这东西根本不起作用”：It doesn't work at all.或It didn't work at all. 如果你想说的意思是“这么干行不通、没用的”，除了上面动词work否定的用法，还可以简单地说：No way.
philips1111
没有用英语是 no avail，读音：英 [nəʊ əˈveɪl]，美 [noʊ əˈveɪl]。
例句：
1、They entreated and threatened, but all this seemed of no avail.
他们时而恳求，时而威胁，但这一切看来都没有用。
2、The bride immediately collapsed in a fit of tears as panicked wedding guests stepped in to try to resolve the dispute. But their efforts were to no avail.
新娘立刻就情绪崩溃、泪如雨下，婚礼上的宾客们也惊慌失措，纷纷前来劝说，企图解除争端。但是人们的劝说没有用。
3、I will not crave world stop turning I know escape at all to no avail.
我不会奢求世界停止转动，我知道逃避一点都没有用。
4、She called on spirits and Buddhas and made innumerable vows, all to no avail.
她把一切的神佛都喊到了，并且许下多少誓愿，都没有用。
5、Always will I take another step. If that is of no avail I will take another, and yet another. In truth, one step at a time is not too difficult.
再前进一步，如果没有用，就再向前一步。事实上，每次进步一点点并不太难。
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