1. valuable和invaluable不是反义词关系；有时候它们含义接近：
valuable宝贵的;珍贵的；有价值的;很重要的;贵重的;很有用的;很值钱的
invaluable无价的，珍贵的；极宝贵的;极有用的
The book provides valuable information on recent trends.
此书就近来的发展趋势提供了宝贵的信息。
Luckily, nothing valuable was stolen.
幸运的是，没有贵重物品失窃。
The thieves took three pieces of valuable jewellery.
窃贼盗走了三件贵重的首饰。
Many of our teachers also have valuable academic links with Heidelberg University.
我们的很多老师也和海德堡大学保持着有益的学术联系。
Just because a camera is old does not mean it is valuable.
古旧的相机不一定就值钱。
Time is your most valuable resource, especially in examinations.
时间是你最有价值的帮手，尤其是在考试中。
I'm not sure that this is the most valuable use of my time.
我不能肯定我的时间这样来安排最有价值。
The book provides valuable information on recent trends.
此书就近来的发展趋势提供了宝贵的信息。
Our experience as refugees taught us many valuable lessons.
我们流亡的经历给了我们许多宝贵的教训。
He gained valuable experience whilst working on the project.
从事这项工程使他获得了宝贵的经验。
Any piece of silver bearing his mark is extremely valuable.
带有他的印记的每一件银器都极有价值。
Never leave cash or other valuables lying around.
现金或其他贵重物品请勿乱放。（名词，贵重物品;财宝）
The abbey had been plundered of its valuables.
寺院的珍宝被洗劫一空。（名词，贵重物品;财宝）
They claim that police lost valuable time in the early part of the investigation.
他们声称警方在调查之初错过了宝贵的时间。
Now please be brief — my time is valuable.
请长话短说——我的时间宝贵。
The church has several valuable works of art.
教堂有几件珍贵的艺术品。
The golden rule is never to clean a valuable coin.
重要的原则是决不清除贵重硬币上的污垢。
Students can gain valuable experience by working on the campus radio or magazine.
学生们在校广播台或校刊工作能够获得宝贵的经验。
The most valuable item on show will be a Picasso drawing.
展览会上最贵重的展品是毕加索的一幅素描。
The festival remains a valuable showcase for new talent.
音乐节一直是新秀展示才华的宝贵机会。
His wife was wondering where he put their most valuable belongings.
他的妻子很想知道他把他们最值钱的财物放在哪里。
Two valuable paintings were stolen from that museum last night.
那个博物馆昨晚有两幅名贵的画失窃。
invaluable information
宝贵的信息
The book will be invaluable for students in higher education.
这本书对于高校学生将有重大价值。
The research should prove invaluable in the study of children's language.
这项调查对于儿童语言的研究将极有价值。
I was able to gain invaluable experience over that year.
在那一年里我有幸获得了非常宝贵的经验。
The computer is now an invaluable tool for the family doctor.
计算机现在是家庭医生非常有用的工具。
In his job, patience is an invaluable asset.
他干的这份工作，耐心是无价之宝。
The research should prove invaluable in the study of linguistics.
该调查研究在语言学研究领域的重要性应该会得到证实。
Their advice was invaluable to me at that stage of my work.
他们的建议对我那一阶段的工作非常宝贵。
It makes invaluable reading for anyone who wants to acquire a greater depth of understanding of the subject.
想要对这个问题有更加深入的了解，读读它会受益匪浅。
If you are a regular reader of Homes& Gardens you will know what an invaluable source of inspiration it is
如果你常读《家和花园》杂志的话，就会知道它是一个多么宝贵的灵感源泉。
A computer would have been invaluable for this job.
一台计算机对这个工作的作用是无法估计的。
Somewhere along the way, the same parent ends up becoming an invaluable member of the team ．
在这一过程中,这位家长最终成为了团队中非常重要的一员。
高考真题- 2019 全国
Experts say it's an invaluable social practice that results in big benefits ．
专家说,这是一种无价的社会实践,可以带来巨大的好处。
高考真题- 2018 全国
2. valuable的反义词是valueless或worthless 没有价值的
I'm afraid your shares are now worthless.
恐怕你的股票现在一文不值了。
Such attitudes are valueless unless they reflect inner cognition and certainty.
这种态度如果不能反映内心的认知和把握就毫无价值。
Training is worthless unless there is proof that it works.
除非能证明训练有效，否则就是白搭。
His suggestion is valueless.
他的建议毫无价值。
Critics say his paintings are worthless.
批评家说他的画毫无价值。
Constant rejections made him feel worthless.
不断地遭到拒绝使他觉得一无是处。
You feel you really are completely worthless and unlovable.
你会觉得自己真是毫无价值，一点也不讨人喜欢。
I'd been brainwashed into believing I was worthless.
我被洗了脑，认为自己一文不值。
Their proposals are all worthless and designed out of sinister motives.
他们的建议不仅一钱不值，而且包藏祸心。
She had been hoodwinked into buying a worthless necklace.
她受骗买了条一文不值的项链。
The guarantee could be worthless if the firm goes out of business...
如果厂家倒闭，保修单就会变得毫无用处。
Such advice as he was given has proved almost worthless.
他所得到的那点建议结果证明几乎完全没用。
He dismissed the opinion polls as worthless.
他认为民意测验毫无用处而不予考虑。
It contained so many errors as to render it worthless.
它错误太多，所以毫无用处。
The co-defendants are charged with selling worthless junk bonds to thousands of unsuspecting depositors.
此案的共同被告因向数千不明真相的存款人出售毫无价值的垃圾债券而被起诉。
Let out the secret and it is worthless.
戳破这窗户纸就一文不值。
The car was a worthless wreck after the collision.
撞车以后，那辆车成了毫无价值的残骸。
An agreement is worthless till our name is written with a pen.
在用笔写上我们的名字之前，协议是没有价值的。
中考真题- 2019 河北