under的各种用法及例句大全310

“under”是一个英语常用介词，其含义丰富，用法灵活，可以表示位置、数量、情况、条件等多种含义。准确理解和运用“under”至关重要。本文将从不同角度出发，提供1500字左右的例句，力求全面展现“under”的各种用法，并配以中文释义，帮助读者更好地掌握这个介词。

一、表示位置：在……下面

这是“under”最基本的用法，指位于某物或某人的下方。例如：
The cat is sleeping under the table. (猫正在桌子底下睡觉。)
The ball rolled under the bed. (球滚到了床底下。)
She found a coin under a bush. (她在灌木丛下发现了一枚硬币。)
The bridge goes under the river. (桥从河底下穿过。)
He hid the treasure under the floorboards. (他把宝藏藏在木地板下面。)
The submarine is operating under the sea. (潜艇正在海底运行。)
There's a mouse scurrying under the floor. (一只老鼠正在地板下乱窜。)
The sun is shining brightly, but it’s still chilly under the trees. (阳光明媚，但在树荫下仍然很冷。)
My house is located under a steep hill. (我的房子位于一座陡峭的山坡下。)
He dug a hole under the old oak tree. (他在古老的橡树下挖了一个洞。)

二、表示数量或程度：少于；不到

在这种用法中，“under”表示数量或程度低于某个标准。
He's under thirty years old. (他不到三十岁。)
The project was completed under budget. (项目在预算以内完成。)
The temperature is under zero degrees. (温度低于零度。)
She weighs under 50 kilograms. (她的体重不到50公斤。)
The car is travelling under the speed limit. (汽车行驶速度低于限速。)
The sales figures are under expectations. (销售额低于预期。)
They finished the work under pressure. (他们在压力下完成了工作。) 这句的“under”更接近“在…情况下”，但仍包含“数量/程度”的隐含意义。
The company is operating understaffed. (公司人手不足。)
He's been under a lot of stress lately. (他最近承受着很大的压力。)
The child is under medical supervision. (这个孩子正在接受医疗监督。)

三、表示情况或条件：在……情况下；在……期间；根据……

在这种用法中，“under”表示某种情况、条件或规则下发生的事情。
The agreement is under review. (协议正在审核中。)
The matter is under consideration. (此事正在考虑中。)
The building is under construction. (大楼正在建设中。)
The country is under martial law. (这个国家处于军事管制之下。)
She's under a lot of pressure at work. (她在工作中承受着很大的压力。)
The project is under the direction of Professor Smith. (该项目由史密斯教授指导。)
They signed the contract under duress. (他们在胁迫下签署了合同。)
This product is sold under license. (此产品在许可下销售。)
The witness gave evidence under oath. (证人在宣誓下作证。)
We met under unusual circumstances. (我们在不寻常的情况下相遇。)