only + number/amount phrase
only 一般紧贴它所修饰的数量或程度成分之前，强调数量少、程度低，不放在句末。
The whole trip costs only fifty dollars.
整个行程只要五十美元。
只；仅仅
才；只是；就在；才；结果却；不料；没有其他或进一步的；专门地。；不超过；仅仅。
Used to say that something is limited to a particular thing or amount; just.
没有其他或进一步的；专门地。
Without others or anything further; exclusively.
不超过；仅仅。
No more than; just.
刚刚。
As recently as.
仅此而已
and nothing more
强调某事是唯一的或必要的。
Emphasizing something that is just or necessary.
引出令人失望或惊讶的结果,使之前提到的事情变得徒劳。
Introduces a disappointing or surprising outcome that renders futile something previously mentioned.
I only ate one slice of pizza.
我只吃了一片披萨。
用法提示：副词'only'表示数量上的限制，意为'仅仅'。
AI contextual example
She only works part-time.
她只做兼职工作。
用法提示：副词'only'修饰动词，表示仅限某种方式或范围。
AI contextual example
We have only three days left.
我们只剩下三天了。
用法提示：副词'only'放在数量前，强调数量少。
AI contextual example
only 一般紧贴它所修饰的数量或程度成分之前，强调数量少、程度低，不放在句末。
The whole trip costs only fifty dollars.
整个行程只要五十美元。
用来引出出乎意料、令人失望的结果，使前面提到的努力显得徒劳。
She opened the box only to find it empty.
她打开盒子，结果却发现里面是空的。
only 引导的状语放在句首时，主句要用倒装语序，即把助动词或 be 动词提到主语前。
Only then did I understand what she meant.
直到那时我才明白她的意思。
grammar · medium
易错句子Only when he arrived I realized the truth.
正确表达Only when he arrived did I realize the truth.
当 only 引导的状语（only when / only then / only after 等）放到句首时，主句必须用倒装：把助动词或 be 动词提到主语前面，如 did I realize。中文没有这种部分倒装，学习者常按中文语序直接写 I realized，就成了病句。
grammar · medium
易错句子Only one of my friends have a car.
正确表达Only one of my friends has a car.
only one of + 复数名词作主语时，真正的主语中心词是单数的 one，of my friends 只是修饰成分，所以谓语用单数 has。中文动词不随主语单复数变化，学习者容易照着紧挨着的复数 friends 来变位，误用 have。
grammar · medium
易错句子I only have meetings on Mondays.
正确表达I have meetings only on Mondays.
only 是焦点副词，总是修饰紧跟在它后面的那个成分。要表达“开会只在星期一”这层意思，only 必须直接放在 on Mondays 前面；若放在 have 前面，句子会被理解成“星期一我只做开会这一件事”（不做别的），与想表达的意思不同。
刚刚；勉强才
She had only just arrived when the phone rang.
她刚到，电话就响了。
只有在……情况下；只有……才
You can borrow the car only if you drive carefully.
只有你小心驾驶，才能借用这辆车。
只有当……的时候；只有在……时
I feel truly happy only when I'm with my family.
只有和家人在一起时，我才真正感到幸福。
不仅……而且……
The movie was not only interesting but also moving.
这部电影不仅有趣，而且感人。
非常；极其
I'd be only too glad to help you.
我非常乐意帮助你。
结果却；不料
He worked all day, only to be told his report was rejected.
他工作了一整天，结果却被告知报告被否决了。
非常；极其
I'd be only too glad to help you with that.
我非常乐意帮你处理那件事。
勉强；刚刚
She only just caught the plane.
她勉强赶上了飞机。
你只能活一次。
Don't be afraid to take that trip — after all, you only live once.
别害怕去旅行——毕竟，你只能活一次。
只能有一个。
In the movie Highlander, the famous line is 'There can be only one.'
在电影《高地人》中，著名台词是：“只能有一个。”
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结果却；不料
I ran all the way only to miss the bus.
我一路跑过去，结果却错过了公共汽车。