English version

knock something off (something)

From Longman Business Dictionaryknock something off (something) phrasal verb [transitive] informal to reduce the price, value etc of something by a particular amountThe poor results knocked 13p off the share price. knock→ See Verb table
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Verb table
knock
Simple Form
Present
I, you, we, theyknock
he, she, itknocks
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Past
I, you, he, she, it, we, theyknocked
Present perfect
I, you, we, theyhave knocked
he, she, ithas knocked
Past perfect
I, you, he, she, it, we, theyhad knocked
Future
I, you, he, she, it, we, theywill knock
Future perfect
I, you, he, she, it, we, theywill have knocked
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Continuous Form
Present
Iam knocking
he, she, itis knocking
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you, we, theyare knocking
Past
I, he, she, itwas knocking
you, we, theywere knocking
Present perfect
I, you, we, theyhave been knocking
he, she, ithas been knocking
Past perfect
I, you, he, she, it, we, theyhad been knocking
Future
I, you, he, she, it, we, theywill be knocking
Future perfect
I, you, he, she, it, we, theywill have been knocking
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