1
be hard to do
表示某事困难。
This math problem is hard to solve.
这道数学题很难解。
困难的；费力的
hardest — superlative of hard
先理解核心含义，再看它在真实句子里的用法。
困难的；费力的
Difficult; requiring great effort.
This math problem is hard to solve.
这道数学题很难解。
坚固和坚硬
Solid and firm.
困难的；需付出巨大体力或脑力才能完成、理解或忍受的
not easy; requiring great physical or mental effort to accomplish or comprehend or endure
具有严厉性质；呈现困难
Having a severe property; presenting difficulty.
冷静的；客观的
dispassionate
This math problem is very hard.
这道数学题非常难。
AI contextual example
The diamond is one of the hardest materials.
钻石是最坚硬的物质之一。
AI contextual example
It was a hard climb to the top of the mountain.
爬到山顶是一次费力的攀登。
AI contextual example
why is it so hard for you to keep a secret?
为什么对你来说保守秘密这么难?
WordNet
表示某事困难。
This math problem is hard to solve.
这道数学题很难解。
强调对某人而言困难。
It is hard for me to understand his accent.
我很难听懂他的口音。
表示严厉对待或造成困难。
Don't be too hard on yourself.
不要对自己太苛刻。
表示质地坚硬。
The rock is hard.
这块石头很硬。
Not this
The question is hard to be answered.
Use this
The question is hard to answer.
形容词 hard 后接不定式时，不定式用主动形式表示被动含义，不需要用被动语态。
Not this
I feel very hard to concentrate.
Use this
I find it very hard to concentrate.
英语中描述‘做某事很困难’时，常用‘find it + 形容词 + 不定式’或‘It is + 形容词 + (for sb) + 不定式’结构，而不是直接说‘feel hard to do’。汉语‘觉得很难’对应英文要调整句型。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
艰苦的工作
She put in a lot of hard work to finish the project on time.
为了按时完成项目，她付出了很多艰苦的工作。
艰难时期
He is going through a hard time after losing his job.
他失业后正经历一段艰难时期。
辛苦的一天
After a hard day at work, I just want to relax.
辛苦工作一天后，我只想放松一下。
难题
The teacher asked a hard question that no one could answer.
老师问了一个没人能回答的难题。
坚硬的表面
The ball bounced off the hard surface and rolled away.
球从坚硬的表面弹开，滚走了。
确凿的证据
The police found hard evidence linking him to the crime.
警方发现了将他与犯罪联系起来的确凿证据。
严格的，不容改变的
There are no hard and fast rules about how to raise children.
关于如何抚养孩子，没有严格的规定。
努力工作
She was hard at work on her thesis all weekend.
整个周末她都在埋头写论文。
难以获得
Good jobs are hard to come by in this economy.
在这种经济形势下，好工作很难找到。
在这个世界上，皮条客也不容易
It's hard out here for a pimp, trying to make a living.
在这个世界上，皮条客也不容易，努力谋生。
当天赋不努力时，努力胜过天赋
Remember, hard work beats talent when talent doesn't work hard.
记住，当天赋不努力时，努力胜过天赋。
Use hardest naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
hard 既指'困难'又指'坚硬'，联想：硬石头难敲碎。
表示“困难”时，该词为中性，适用于多种场合，如学术、工作、日常生活中。
注意：作形容词时，常与不定式或介词搭配。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.