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IELTS BNC: 986 COCA: 2026
useful
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adjective /ˈjuːsf(ə)l/
  1. 1
    helpful for doing or achieving something 有帮助的；有用的；有益的

    Here's some useful information about travel in Canada. 这是一些关于在加拿大旅行的有用信息。

    a useful tool/technique/gadget 有用的工具/技术/小机械

    Her book is a useful contribution to our understanding of how Mozart worked. 她的书对于我们了解莫扎特是如何工作的大有帮助。

    useful to :

    I was useful to them because I could speak French. 由于我会说法语，所以对他们有帮助。

    useful for :

    That basket would be useful for picnics. 那个篮子会对野炊很有用。

    useful for doing something :

    Old pictures are useful for seeing how people used to dress. 老照片对了解人们过去的穿着很有帮助。

    useful (for someone) to do something :

    Thanks. It's useful to know that. 谢谢，知道那件事很有帮助。

    Would it be useful for you to ask us some questions? 你问我们一些问题会有帮助吗？

    prove useful :

    Keep a record of everything that might prove useful. 把任何可能证明有用的东西都记录下来。

     Synonyms and related words
    Useful and effective and working correctly: useful, efficient, effective...
  2. 2
    British informal good, or skilful 好的；熟练的

    a useful player 出色的运动员

     Synonyms and related words
    Skilful and able: able, capable, professional...
  3. From our crowdsourced Open Dictionary
    3
    as useful as ... used for saying that something is completely useless

    He's about as useful as a chocolate teapot.

    All this packaging is about as useful as a screen door in a submarine.

    Submitted from United Kingdom on 22/03/2018
     
Get It Right!: useful
Although the adjective full ends with a double ‘ l', adjectives like useful have only one ‘ l':
✗ Find a more usefull spare time activity than driving around in a car.
✓ Find a more useful spare time activity than driving around in a car.
Other adjectives ending in -ful are also written with only one ‘ l', for example:
careful, faithful, harmful, helpful, meaningful, painful, powerful, skilful, successful
Note however that adverbs formed from these adjectives are written with double ‘ l', for example:
carefully, faithfully, helpfully, usefully etc
IELTS BNC: 986 COCA: 2026
useful

adjective

VERBS | ADVERB | PREPOSITION VERBS➤be, look, prove, seem有用；看起來可用；證明有用；好像有效▸➤become變得有用▸➤make yourself做有用的人◇She told Fred to make himself useful.她告訴弗雷德做些有價值的事。➤consider sth, find sth認為／覺得⋯有用◇some leaflets which you might find useful一些你可能覺得有用的傳單ADVERB➤extremely, fairly, very, etc.極其／相當／非常有用▸➤enormously, especially, exceptionally, highly, immensely, incredibly, more than (informal) , particularly, terribly, tremendously非常有益；特別有用；格外有幫助；極其有用◇She has made an exceptionally useful contribution to the debate.她為辯論作出了極大貢獻。➤genuinely, truly的確有幫助◇It needs to give more information to be truly useful.要想真的派上用場，還需要提供更多信息。➤increasingly越來越有用▸➤equally同樣有用◇The same information is equally useful when negotiating.這條信息在談判中也同樣有用。➤generally, universally普遍有用◇This method has proved the most generally useful.結果證明這種方法應用範圍最廣。➤potentially可能有用▸➤practically實用◇The subject is practically useful and will stand you in good stead when looking for a job.這個學科很實用，對你日後找工作有利。➤certainly, undoubtedly毫無疑問是有用的◇an undoubtedly useful skill肯定有用的技術➤economically, politically, socially對經濟／對政治／對社會有用◇to provide rewarding and socially useful employment提供有價值及對社會有用的工作PREPOSITION➤as作為⋯有用◇It was useful as a short-term measure.作為短期措施它是有用的。➤for對⋯有用◇This tool is useful for a variety of purposes.這個工具是多用途的。◇Internet booking is useful for people who want a short break.網上預訂對需要短期度假的人有用。➤in在⋯方面擅長◇She was very useful in dealing with foreign visitors.她很善於同外國訪客打交道。➤to對⋯有幫助◇information which will be useful to new mothers會對新手媽媽有幫助的信息
IELTS BNC: 986 COCA: 2026
useful

adjective

useful ♦︎ convenient ♦︎ handy ♦︎ practical ♦︎ usable ♦︎ great for sth ♦︎ of use ♦︎ functionalThese words all describe sth which helps you do sth or is suitable for a particular purpose. 这些词均表示有用的、有帮助的、适用的。PATTERNS AND COLLOCATIONS 句型和搭配◆to be useful / of use to sb◆to be useful / convenient / handy / great for doing sth◆useful / handy / practical tips / hints◆to come in useful / handy◆very / quite useful / convenient / handy / practical / usable / functional◆highly useful / convenient / practical / functional◆extremely useful / convenient / practical■ useful that can help you to do or achieve what you want 有用的；有益的；有帮助的◆a useful book / gadget有用的书／小器具◆It can be useful to write a short summary of your argument first.先把你的论点简要地总结一下写下来，可能会有帮助。◆He might be useful to us.我们也许用得上他。◆Don't just sit watching TV－make yourself useful!别光坐着看电视，帮一下忙吧！◆Some products can be recycled at the end of their useful life.有些产品过了有效使用期限后是可以回收再利用的。OPP useless ⇨ useless ▸ usefully

adverb

◆The money could be more usefully spent on new equipment.这笔钱用在新设备上可能更有价值。■ convenient useful, easy or quick to use or do 实用的；便利的；省事的◆A bicycle is often more convenient than a car in towns.在城镇骑自行车往往比开车更方便。◆It is very convenient to pay by credit card.用信用卡付账非常方便。◆Fruit is a convenient source of vitamins and energy.水果是维生素和能量的便利来源。◆ (disapproving) He used his wife's birthday as a convenient excuse for not going to the meeting.他说要给妻子过生日，利用这个凑巧的借口就不去参加会议了。▸ conveniently

adverb

◆The report can be conveniently divided into three main sections.这份报告可以很方便地划分为三个主要部分。■ handy (informal) convenient to use 易使用的；便利的◆The introductory booklet contains some handy tips for getting started.这本入门小册子里有一些如何上手的小窍门儿。◆Take your penknife－you never know when it might come in handy (= be handy).带上你的小折刀，说不定什么时候会用得到。■ practical (of things) useful or suitable for a particular situation （东西）有用的，适用的◆It's a practical little car－ideal for the city.那是很实用的小车，非常适合在城市里开。◆Travel by boat was often faster and more practical than travel along the primitive roads.乘船旅行往往比沿着简陋的公路旅行更快捷、更实际。■ usable that can be used; in good enough condition to be used 能用的；可用的；适用的◆How can we display this data in a usable form?我们如何把这些数据以实用形式展示出来呢？◆Take my bike－it's rusty, but it's perfectly usable.用我的自行车吧，虽然生锈了，但骑起来完全没问题。 OPP unusable ⇨ useless ■ great for sth

phrase

 (informal, especially spoken) very suitable or useful for sth 很适合的；（对⋯）很有用的◆This gadget's great for opening jars.这小玩意儿开广口瓶好使得很。◆Try this cream－it's great for spots.试试这种乳霜吧，对消除皮肤斑点挺有效的。■ of use

idiom

 (formal) useful 有用；有帮助◆Can I be of any use (= can I help)?有什么要我帮忙的吗？◆Your suggestion will be kept on file and may be of use should circumstances change.你的建议将存档，若情况有变，也许会有帮助。■ functional practical and useful; with little or no decoration 实用的；重功能轻装饰的◆Bathrooms don't have to be purely functional.浴室不必只讲求实用。◆The office is a functional working area, designed with efficiency in mind.这个办公室是个实用的工作场所，设计时考虑的是效能。

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