1. to go without food for a period of time, often for religious or health reasons
禁食，齋戒（通常因宗教或健康原因在一段時間內不進食）
Many people fast during Ramadan.
許多人在齋戒月期間禁食。
She decided to fast for 24 hours before the medical test.
她決定在醫療檢查前禁食24小時。
Fast Meaning（定義、用法、例句與發音）
fast
verb
快速理解
What does "Fast" mean?What are 2-3 core uses of "Fast"?
「fast」作動詞時，主要指為了宗教或健康原因而禁食。
- 1
禁食（宗教）
EN: to abstain from all or some kinds of food or drink, especially as a religious observance
翻譯: （尤指因宗教原因）禁食，齋戒
- 2
禁食（健康）
EN: to eat little or no food for a period of time, often for health reasons
翻譯: （常為健康原因）節食，斷食
小提醒：注意「fast」作動詞時，意思與其常見的形容詞（快速的）或副詞（快速地）用法完全不同，容易造成混淆。
發音（How to Pronounce "Fast" in English）
How to pronounce "Fast" in English?"Fast" US vs UK pronunciation
點擊下方的 US / UK 按鈕可播放發音。
Real-life Examples of "Fast" from YouTube Videos
Desining from Day One: Artists as Founders: Multiverse (S20) - YC Gaming Tech Talks 2020
Y Combinator
“uh, i had to understand timelines were fast. decision making is really important. you're accommodating a larger team and a product that's being developed very quickly.”
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Definitions（定義）
What are the definitions of "Fast"?How does "Fast" change by context?
2. to eat very little or nothing for a period of time, often to lose weight
節食，斷食（通常為了減重在特定時間內吃得極少或不吃）
He is fasting to try to lose a few pounds.
他正在斷食，試圖減掉幾磅體重。
Some diets involve fasting for 16 hours each day.
有些飲食法包含每天斷食16小時。
3. to abstain from certain types of food or drink
戒絕（特定食物或飲料）
During Lent, some Christians fast from meat on Fridays.
在大齋期期間，一些基督徒會在週五戒絕肉食。
She fasted from sugar for an entire month.
她整整一個月戒絕糖分。
Grammar & Patterns（句型）
What are common sentence patterns for "Fast"?How to make natural sentences with "Fast"?
| Pattern | Meaning | Example |
|---|---|---|
| fast + noun | 禁食（某物） | He decided to fast sugar for a month. (他決定禁食糖一個月。) |
| fast + for + (period of time) | 為（某目的/某人）禁食一段時間 | They fast for religious reasons during the holiday. (他們在節日期間因宗教原因禁食。) |
| fast + from + noun | 戒除（某物） | She is fasting from social media this week. (她本週戒除使用社交媒體。) |
| fast + adverb | 以某種方式禁食 | He fasts strictly according to the rules. (他嚴格按照規定禁食。) |
用法說明
How is "Fast" different from similar structures?What usage mistakes are common with "Fast"?
fast doing vs fast to do
- fast doing 通常描述一個持續或習慣性的快速動作或狀態，強調動作本身進行的速度。
- fast to do 則常用來描述某人或某物「易於快速完成某事」的特性或傾向，常與
be動詞連用。 - 在描述對某種情況的即時反應時，兩者有時可互換，但 fast to do 更強調反應的「迅速性」與「傾向」。 EN: The car is fast approaching the finish line. 翻譯: 那輛車正快速接近終點線。
EN:This software is fast to install on any computer.
翻譯:這款軟體在任何電腦上安裝都很快速。
EN:She was fast becoming an expert in the field.
翻譯:她正迅速成為該領域的專家。
EN:He is always fast to criticize but slow to help.
翻譯:他總是急於批評，卻遲於伸出援手。
總結建議
一般來說，描述持續的快速動作用 fast doing，而描述易於快速完成的特性則用 fast to do。
易混淆對比
What is the difference between "Fast" and similar words?How to choose "Fast" vs alternatives?
fast vs quick
「fast」通常描述持續性的速度或速率，而「quick」則強調反應或動作的迅速、短暫性。
fast vs rapid
「fast」是較通用的速度描述，而「rapid」則更正式，常指一系列動作或變化在短時間內發生。
fast vs swift
「fast」強調絕對速度，而「swift」則帶有輕盈、敏捷、流暢且迅速完成的意味。
口語用法
How is "Fast" used in spoken English?What is the spoken vs formal difference for "Fast"?
引述
在對話中，人們有時會用「fast」來直接引述或模仿他人的說法，尤其是當談論特定指令或習慣用語時。 EN: She just said, "Fast! We're running out of time!" 翻譯: 她只說了：「快點！我們沒時間了！」
EN:My coach always yells, "You need to fast from distractions before the game."
翻譯:我的教練總是喊：「比賽前你需要禁絕一切干擾。」
語氣強調
在非正式口語中，「fast」可單獨使用或重複，以強烈催促或表達緊迫感。 EN: Fast, fast! The bus is about to leave! 翻譯: 快，快！公車要開了！
EN:I told him to fast, but he just kept eating.
翻譯:我告訴他要禁食，但他還是一直吃。
停頓填充
在思考下一句話時，說話者可能會用「fast...」作為填充詞，引出一項迅速的行動或對比。 EN: So I was like, fast... and then I realized I forgot my keys. 翻譯: 所以我當時就想，快點...然後才發現我忘了帶鑰匙。
EN:The plan is to fast... well, at least for the morning.
翻譯:計畫是要禁食...嗯，至少早上是這樣。
正式寫作注意：上述口語用法（尤其是作為填充詞或重複以強調）在正式書寫或學術文章中應避免使用，應改用更完整、結構清晰的句子來表達。
常見短語
What common collocations use "Fast"?What fixed phrases with "Fast" should I remember?
fast on
fast on something
迅速抓住、利用或對某事物做出反應
fast to
fast to something
迅速依附、黏著或固定於某物
play fast and loose
play fast and loose (with something/someone)
（對規則、承諾或某人）行事輕率、不負責任
fast-talk
fast-talk someone (into/out of something)
用快速、流利且常帶欺騙性的言語說服某人
fast-forward
fast-forward (through something)
快速推進（如錄影帶、進度）；比喻快速跳過或加速進程
hold fast
hold fast (to something/against something)
緊緊抓住；堅守（信念、立場）；抵禦
常見錯誤
What are common mistakes with "Fast"?Which "Fast" sentences look correct but are wrong?
×He fasts his car.
✓He drives his car fast.
「fast」作為動詞時，意思是「禁食、齋戒」，而不是「使...變快」或「快速操作」。若要表達「快速做某事」，應使用副詞「fast」修飾動詞，或使用其他動詞如「speed up」。
×He fast yesterday.
✓He fasted yesterday.
動詞「fast」的過去式是規則變化，應加上「-ed」。許多學習者會忘記將動詞變為過去式，導致時態錯誤。
×I fast meat.
✓I fast from meat. / I give up meat for a fast.
動詞「fast」通常為不及物動詞，後面不直接接受詞。若要說明禁食的內容，需使用介系詞「from」引出。
×Please fast the process.
✓Please speed up the process. / Please hurry up.
動詞「fast」沒有「加快、加速」的意思。表達此意應使用「speed up」、「accelerate」或「hurry up」。
×I am fast every Monday.
✓I fast every Monday.
表達習慣性或重複性的動作（如每週禁食），應使用簡單現在式，而非現在進行式。現在進行式用於描述正在進行的動作或臨時安排。
詞形變化
What are the word forms of "Fast"?What are tense/participle forms of "Fast"?
fasts(3rd_singular)fasting(present_participle)fasted(past)fasted(past_participle)