knock down ( knocking, knocked, knocks )

• 1. 

  PHRASAL VERB To knock down a building or part of a building means to demolish it. 拆掉 (建筑物等)

  例：

  Why doesn't he just knock the wall down?

  他为什么不索性把墙拆掉？

• 2. 

  PHRASAL VERB If someone is knocked down or is knocked over by a vehicle or its driver, they are hit by a car and fall to the ground, and are often injured or killed. (开车) 撞倒 [英国英语]

  例：

  He died after being knocked down by a car.

  他被一辆汽车撞倒后死了。

  例：

  A drunk driver knocked down and killed two girls.

  一个喝醉了酒的司机撞死了两个女孩子。

  例：

  A car knocked him over.

  一辆汽车把他撞倒了。

• 3. 

  PHRASAL VERB To knock down a price or amount means to decrease it. 降低 (价格) [美国英语]

  例：

  The market might abandon the stock, and knock down its price.

  商场可能会清理库存，降低价格。