1
double + sth
double 作为及物动词，后接宾语，表示使某物增加一倍。
The company doubled its profits this year.
这家公司今年利润翻了一番。
使加倍；翻一番；是…的两倍
先理解核心含义，再看它在真实句子里的用法。
使加倍；翻一番；是…的两倍
To make or become twice as much; to multiply by two or be equal to twice the amount.
The company doubled its profits this year.
这家公司今年利润翻了一番。
乘以二
To multiply by two.
翻倍
To increase by 100%, to become twice as large in size.
是...的两倍
To be the double of; to exceed by twofold; to contain or be worth twice as much as.
对折
To fold over so as to make two folds.
double
Base
原形
doubles
3rd person
第三人称单数
doubling
-ing
现在分词
doubled
Past
过去式
doubled
Past participle
过去分词
He doubles his income every year.
他每年收入翻倍。
She doubled the recipe last night.
她昨晚把食谱的量加倍了。
The company is doubling its workforce this quarter.
这家公司本季度正在将员工人数翻倍。
规则动词，过去式加-ed，现在分词去e加ing。
He doubles his income every year by working overtime.
他每年通过加班使收入加倍。
The company doubled its profits last quarter.
这家公司上个季度使利润翻了一番。
She is doubling the recipe to feed more guests.
她正在把食谱的量加倍，以便招待更多客人。
double 作为及物动词，后接宾语，表示使某物增加一倍。
The company doubled its profits this year.
这家公司今年利润翻了一番。
double 作为不及物动词，主语是数量或事物，表示自身加倍。
The population has doubled in the last decade.
人口在过去十年中翻了一番。
Not this
The population double in ten years.
Use this
The population doubles in ten years.
英语中，主语是第三人称单数时，谓语动词需加-s；而汉语动词没有单复数变化，学习者容易遗漏。
Not this
She doubled her income twice in one year.
Use this
She doubled her income in one year.
double本身表示“使加倍”，即变为两倍，再用twice造成语义重复且逻辑矛盾，应删去twice。
Choose the next layer that will help you use double with more confidence.
Includes Synonyms & Antonyms
Expand your vocabulary with synonyms and antonyms.
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
规模/尺寸翻倍
The company has doubled in size since 2010.
2010年以来，这家公司的规模翻了一倍。
使数量翻番；把量加倍
If you double the amount of sugar, it will be too sweet.
如果你把糖的用量加倍，就会太甜。
兼作；兼用
The spare room doubles as an office.
这间备用房间兼作办公室。
弯腰；弓身（常因大笑或疼痛）
He doubled over with laughter at the joke.
他听到那个笑话笑得直不起腰。
代替；顶替
A stuntman doubled for the actor in the dangerous scene.
一位特技演员在那个危险场景中代替了那位演员。
原路折返；掉头返回
We doubled back to pick up the keys we had forgotten.
我们原路折返，去拿忘记带的钥匙。
加倍投入
The CEO said the company will double down on artificial intelligence.
首席执行官表示公司将在人工智能领域加倍投入。
原路折返
The hikers realized they had taken the wrong path and had to double back.
徒步者们意识到走错了路，只好原路折返。
兼作；兼当
The study doubles as a guest room.
这间书房兼作客房。
加倍，加倍，辛劳与烦恼；烈火燃烧，大锅沸腾。
The witches in Shakespeare's Macbeth chant "Double, double toil and trouble" as their spell doubles the power of the brew.
莎士比亚《麦克白》里的女巫在念“加倍，加倍，辛劳与烦恼”时，她们的咒语使魔药的威力加倍。
加倍你的快乐，加倍你的乐趣。
The Doublemint gum slogan tells you to double your pleasure and double your fun—that is, to enjoy twice as much.
Doublemint 口香糖的广告口号告诉你要让你的快乐加倍、乐趣加倍——也就是享受双倍。
Use double naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把纸对折成两层，就是 double——记住这个动作，动词 double 就是‘翻倍/使加倍’。
语域：neutral 常见场景：cooking instructions、financial reports、everyday conversation double 作动词表示“使加倍/翻倍”时，语体为中性：日常对话、菜谱、商务或新闻报道中都比较常见，没有明显的正式或非正式倾向。
与 double (/ˈdʌb.əl/) 押韵的词：trouble, bubble, rubble, stubble（均读 /-ʌb.əl/，注意拼写有 -ouble 和 -ubble 两种）。拼写相似的 couple 读 /ˈkʌp.əl/，末尾是 /p/ 而非 /b/，不押韵。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.