被一辆卡车撞倒了。He knocked his opponent down.他将他的对手击倒。These old houses are to be knocked down.这些旧房子将被拆除。The painting was knocked down to Smith for 5 dollars.那幅画以5美元的价钱卖给史密斯先生了。The machines will be knocked down before being shipped to the Persian Gulf. 这些机器在运往波斯湾之前将被拆卸。He asked '500 for his car, but I managed to knock him down 10 percent.他的汽车要500美元，但我设法使他减价百分之十。
knock out则主要表示下列几种意义：1.敲掉，敲空；2.在拳击中“击倒”对方，使其在规定时间内不能起立 3.比喻用法：“使……震惊，惊奇”。例如：He knocked the nail out.他把钉子敲了出来。He knocked his pipe out before refilling it.再装烟丝之前，他磕出了烟斗里的烟灰。Joe knocked his opponent out in the first round of the contest. 乔在比赛的第一回合中就把对方击倒了。 For a moment he was completely knocked out by the news of his friend's death. 他被他朋友逝世的消息一下子惊得完全呆住。
7、know, know of
know作及物动词，表示“知道，懂得”的意思时，其后一般接表示事物的名词，从句，不定式复合结构。但它表示“认识，了解，熟悉”的意思时，其后多接表示人的名词或代词，也可接事物名词。例如：Do you know their names? 你知道他们的名字吗？Do you know what his name is? 你知道他叫什么名字吗？I never knew him to act without thinking.我从未发现他轻率行事过。I got to know him in the autumn of 1963. 我是在
高考必背英语词汇讲座 K4
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