the shopkeeper knocked 20% off of his goods这句话对吗?

改写以下句子,用含有knock的短语动词代替以下句子中用斜体印出的词组1.the shopkeeper (reduced)the price of all his goods by 20% knock at,knock onWhat's the differance? knock the wood he paid some money to the shopkeeper 解释一下句子和短语的含义1.The old lady hit the thief over the head with a candlestick and now he is unconscious.用knock out 替换 unconsciousover the head candlestick的意思还有整个句子的意思2.The shopkeeper reduced the price knock down by the people knock at the door造句 Don't____(knock)the desk knock into the tree意思 knock knock knock knock knock knock the shopkeeper needs there__(box) of orange juice. he paid the shopkeeper some money. 改写成双宾语动词 paid some money to the shopkeeper.这句话如何翻译?