Useful Meaning(定義、用法、例句與發音)

useful

adjective

快速理解

What does "Useful" mean?What are 2-3 core uses of "Useful"?

形容某物或某人能提供幫助、有實際價值或能達成目的。

  1. 1

    有幫助的

    EN: able to help or assist in achieving something

    翻譯: 能夠幫助或協助達成某事的。

  2. 2

    有實用價值的

    EN: having practical value or serving a purpose effectively

    翻譯: 具有實用價值或能有效達成目的的。

  3. 3

    有益的

    EN: producing good results or benefits

    翻譯: 能產生良好結果或益處的。

  4. 4

    能派上用場的

    EN: suitable or convenient for a particular use or situation

    翻譯: 適合或方便用於特定用途或情況的。

小提醒:注意 'useful' 和 'helpful' 的細微差別:'useful' 強調物品或資訊本身具有實用功能或價值,而 'helpful' 更強調人或行為主動提供協助的意願。

發音(How to Pronounce "Useful" in English

How to pronounce "Useful" in English?"Useful" US vs UK pronunciation

點擊下方的 US / UK 按鈕可播放發音。

Real-life Examples of "Useful" from YouTube Videos

Steven Schwaitzberg: A universal translator for surgeons

TED

And I'd like to show you our prototype of stringing all of these technologies that don't necessarily always talk to each other to become something useful.

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Definitions(定義)

What are the definitions of "Useful"?How does "Useful" change by context?

1. able to be used for a practical purpose or in several ways

有用的,實用的,能派上用場的

This knife is very useful for cutting vegetables.

這把刀用來切蔬菜非常實用。

She gave me some useful advice about the job interview.

她給了我一些關於工作面試很有用的建議。

A smartphone is a useful tool for everyday life.

智慧型手機是日常生活中很有用的工具。

2. helpful and able to improve a situation

有幫助的,有益的

It would be useful to arrive early for the meeting.

提早到達會議會很有幫助。

The extra practice was useful for improving my skills.

額外的練習對提升我的技能很有益。

He made himself useful by helping with the cleaning.

他幫忙打掃,讓自己派上用場。

3. having knowledge, skills, or qualities that are valuable

能幹的,有才幹的

She's a useful member of the team because of her language skills.

因為她的語言能力,她是團隊中很能幹的一員。

He made himself useful around the office by fixing computers.

他在辦公室裡靠修理電腦展現了自己的才幹。

4. effective in achieving a desired result

有效的,奏效的

This technique is a useful way to reduce stress.

這個技巧是減輕壓力的有效方法。

The medicine proved useful in treating the symptoms.

這種藥物被證明對治療症狀是有效的。

Grammar & Patterns(句型)

What are common sentence patterns for "Useful"?How to make natural sentences with "Useful"?
PatternMeaningExample
be + useful是有用的This tool is very useful. (這個工具非常有用。)
useful + for + noun/V-ing對…有用This book is useful for learning grammar. (這本書對學習文法很有用。)
useful + to + person對(某人)有用Your advice was useful to me. (你的建議對我很有用。)
find + something + useful發現…有用I found the tutorial extremely useful. (我發現這個教學極其有用。)
make + something + useful使…有用Adding a search function made the website more useful. (加入搜尋功能讓這個網站更有用。)
it is useful to + V做…是有用的It is useful to check the weather before going out. (出門前查看天氣是有用的。)
a useful piece of + noun一個有用的…He gave me a useful piece of information. (他給了我一個有用的資訊。)

用法說明

How is "Useful" different from similar structures?What usage mistakes are common with "Useful"?

useful doing vs useful to do

  • useful doing 通常用於描述某個「活動或過程本身」具有實用性,強調的是「做這件事」的行為。
  • useful to do 則更常指「去做某件具體的事」是實用的,強調的是「去做」這個動作或決定,常用於提出建議或指出某個行動的價值。
  • 在許多情況下,兩者可以互換使用,但 useful to do 更為常見和通用。
  • 當主詞是「人」時,通常會使用 useful for someone to do 的結構。 EN: Keeping a notebook is useful for remembering ideas. 翻譯: 隨身帶筆記本對記下想法很有用。

EN:It would be useful to keep a notebook for your ideas.

翻譯:為了記下你的點子,準備一本筆記本會很有用。

EN:This tool is useful opening packages.

翻譯:這個工具在拆包裹時很有用。

EN:This tool is useful to open packages with.

翻譯:這個工具可以用來拆包裹,很實用。

總結建議

一般情況下,使用 useful to do 較為安全且通用,尤其在提出建議時;若想強調某活動過程的內在價值,則可考慮 useful doing

易混淆對比

What is the difference between "Useful" and similar words?How to choose "Useful" vs alternatives?

useful vs helpful

「useful」強調物品或資訊本身具有實用價值,能達成特定目的;「helpful」則強調對人或情況提供協助、支持或帶來益處,更具主動性與人性化。

useful vs practical

「useful」指能有效達成目的或解決問題;「practical」則強調在現實中可行、不空想,且常涉及常識或親身實踐的智慧。

useful vs beneficial

「useful」側重於工具性或功能性,能幫助完成任務;「beneficial」則強調對健康、福祉或整體狀況產生長遠的正面影響或好處。

口語用法

How is "Useful" used in spoken English?What is the spoken vs formal difference for "Useful"?

引述

在對話中,當引述或轉述他人的正面評價時,常用來表示認同或強調其價值。 EN: "My tutor said the extra practice was really useful." 翻譯: 我的家教說額外的練習真的很有用。

EN:"Everyone keeps telling me how useful this app is for learning vocabulary."

翻譯:大家一直跟我說這個 App 對學單字多有用。

語氣強調

在口語中,常與 "so"、"really"、"incredibly" 等副詞連用,以加強語氣,表達強烈的實用性或幫助。 EN: "That tip was so useful, thank you!" 翻譯: 那個建議超有用的,謝謝!

EN:"It's really useful to have someone who knows the area."

翻譯:有個熟悉這區域的人真的非常有用。

停頓填充

在思考或組織語句時,可用 "...it's useful because..." 或 "The useful thing is..." 作為填充,引出後續解釋。 EN: "Well, the useful thing about this method is that it saves a lot of time." 翻譯: 嗯,這個方法有用之處在於它能省下很多時間。

EN:"I like it—it's useful, you know, for keeping track of expenses."

翻譯:我喜歡它—它很有用,你知道的,用來追蹤開銷。

注意:在正式書寫中(如學術論文、商業報告),應避免上述過於口語化的強調詞(如 "so useful")或填充停頓結構,建議使用更精確、正式的表述,例如 "highly practical"、"considerably beneficial" 或 "serves an effective purpose"。

常見短語

What common collocations use "Useful"?What fixed phrases with "Useful" should I remember?

useful information

adjective + noun

有用的資訊

extremely useful

adverb + adjective

極其有用的

find something useful

verb + adjective

發現某物有用

useful for (doing) something

adjective + preposition

對(做)某事有用

come in useful

phrasal verb

派上用場

a useful skill

adjective + noun

一項有用的技能

make oneself useful

verb phrase

讓自己派上用場(幫忙)

常見錯誤

What are common mistakes with "Useful"?Which "Useful" sentences look correct but are wrong?

×This information is very useful for me.

This information is very useful to me.

當表示「對某人有用」時,通常使用介系詞 'to' 而非 'for'。'For' 常用於表示目的或用途,例如 'useful for learning'。

×It is an useful tool.

It is a useful tool.

雖然 'useful' 以字母 'u' 開頭,但其發音以子音 /j/ 開頭(類似 'you'),因此應使用不定冠詞 'a',而非 'an'。

×This book is more useful than that one.

This book is more useful than that one.

錯誤在於將 'useful' 的比較級誤用為 'usefuller'。'Useful' 是雙音節形容詞,其比較級和最高級通常是在前面加 'more' 和 'most',而非在字尾加 '-er' 或 '-est'。

×I want to find something usefully.

I want to find something useful.

'Usefully' 是副詞,用來修飾動詞。此處需要一個形容詞來修飾名詞 'something',因此應使用形容詞 'useful'。

×It's not useful to do that.

It's no use doing that. / It's not useful to do that.

雖然語意相近,但 'It's no use + V-ing' 是固定片語,強調「做某事是徒勞的、沒用的」。而 'It's not useful to do that' 則更側重於「做那件事沒有實用價值」。在表達「做某事是白費力氣」時,使用 'It's no use...' 更為地道。原句文法正確但可能不自然。

詞形變化

What are the word forms of "Useful"?What are tense/participle forms of "Useful"?