1
a no-good [noun]
用作定语，修饰名词。
He is a no-good liar.
他是一个毫无用处的骗子。
毫无用处的；不中用的
先理解核心含义，再看它在真实句子里的用法。
毫无用处的；不中用的
without merit; worthless
He is a no-good liar.
他是一个毫无用处的骗子。
无价值的
without merit
因资金不足退回的
returned for lack of funds
I accidentally bought a no-good laptop that freezes all the time.
我不小心买了一台毫无用处的笔记本电脑，它总是死机。
AI contextual example
The coach dropped the no-good player from the team after one match.
教练在一场比赛后把那个不中用的球员从球队中除名了。
AI contextual example
My mother told me to stop making no-good excuses.
我妈妈叫我不要再找那些没用的借口了。
AI contextual example
the car was a no-good piece of junk
这辆车是个没用的废物
WordNet
用作定语，修饰名词。
He is a no-good liar.
他是一个毫无用处的骗子。
口语中用作表语，表示没用。
This plan is no-good.
这个计划毫无用处。
名词用法，指毫无用处的人。
Don't trust that no-good.
别相信那个废物。
Not this
He is a no good person.
Use this
He is a no-good person.
作为形容词使用时，“no-good”必须带连字符，表示“毫无用处的”；不加连字符的“no good”是分开的短语，意为“不好”，意思完全不同。
Not this
He no-goods the project.
Use this
He is a no-good worker on the project.
“no-good”是形容词或名词，不能用作动词。汉语学习者容易受母语影响，将“没用”直接当作动词使用，但英语中需要添加系动词“is”并调整句子结构。
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Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.