1
verb + flat
She told me to lie flat on the ground.
她让我平躺在地上。
平直地；水平地
flattest — superlative of flat
先理解核心含义，再看它在真实句子里的用法。
平直地；水平地
So as to be flat or level.
She told me to lie flat on the ground.
她让我平躺在地上。
平直地；平坦地
So as to be flat.
完全地；坚决地；明确地
Completely, firmly, or unequivocally.
恰好；精确地
Exactly, precisely.
(强调测量之小)仅仅；正好
Used to emphasize the smallness of the measurement.
After paying the rent, I was flat broke.
付完房租后，我身无分文。
The map should lie flat on the table.
地图应该平铺在桌子上。
She turned down my offer flat.
她断然拒绝了我的提议。
She told me to lie flat on the ground.
她让我平躺在地上。
表示坚决、完全地
He flat refused to help us.
他断然拒绝帮助我们。
表示恰好、刚好
She finished the race in three minutes flat.
她正好在三分钟内完成了比赛。
Not this
He lay flatly on the floor.
Use this
He lay flat on the floor.
“flat” 作副词表示“平直地”时不加 -ly，而 “flatly” 通常用于表示说话方式（如断然拒绝）。
Not this
He is broke flat.
Use this
He is flat broke.
“flat” 作副词表示“完全地”时必须放在被修饰的形容词之前，而中文习惯把程度副词放在后面。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
完全失败；未引起预期反响
His joke fell flat.
他的笑话完全没有引起反响。
平躺；平放
The doctor told me to lie flat on the bed.
医生让我平躺在床上。
全力以赴地；拼命地
We worked flat out all weekend.
我们整个周末都拼命工作。
正好十分钟；仅用十分钟
He fixed the leak in ten minutes flat.
他正好用十分钟就修好了漏水。
断然拒绝
She turned down the offer flat.
她断然拒绝了那个提议。
身无分文；彻底破产
I'm flat broke this week.
这周我身无分文。
全力以赴地；直截了当地
She's been working flat out to get the project finished.
她一直在全力以赴地工作，以完成这个项目。
身无分文的；完全破产的
After paying the bills, I was flat broke.
付完账单后，我身无分文。
完全失败；毫无效果
His attempt at a joke fell flat.
他试图讲的笑话没有引起任何反应。
Use flattest naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
flat 中字母 a 像平放的地板：副词指“平直地”，也指“完全地、断然地”，如 flat refuse 断然拒绝。
语域：mixed 常见场景：physical position (lying, laying flat)、refusing or rejecting firmly、timing a short period (e.g., in ten seconds flat) 作为副词时，语气随搭配变化：表示“平直地”较中性，身体姿态或物体摆放场景常用；表示“完全地/断然地”（如拒绝）多用于日常口语；表示“恰好/仅仅”（如时间上“in ten seconds flat”）通常出现在非正式表达中。正式写作中较少用作这些口语义。
As an adverb, 'flat' typically modifies verbs and means 'completely' or 'exactly', often used with 'fall flat', 'lie flat', etc.
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.