useless和useful的用法.

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useless和useful的用法.

useless 和 useful是两个意思相反的单词
useless
a.
1.无用的;无价值的
The blunt knife is useless.
这把钝刀毫无用处.
2.无效的;无益的
I realized it was useless to reason with him.
我知道和他说理是毫无意义的.
3.【口】(人)无能的,没有用的
I was useless at maths.
当时我的数学差极了.
useful
a.
1.有用的;有益的;有帮助的[(+to/for/in)]
She gave us some useful information.
她给了我们一些很有用的信息.
2.【俚】值得高度赞扬的;对...很熟练的[(+at)]

用英语翻译 useful的反义词是useless 单词obtainable available useful的区别用法? 【英语】有“It is no useless+动名词”这样的用法吗? be useful to和be useful for的区别 be useful to和be useful for的区别? useful的用法1.The book is useful _______ students of English.2. put 语法填空during his useful life he often felt he was useless. whatever ,it is useless 的翻译 useful 和 valuable 关于英语中as的用法He says the technology could be useful,but as that niose的形容词 bright和useful的反义词没用的（和useful 相对的）用英语怎么说?