English version

inform on/against somebody

From Longman Dictionary of Contemporary Englishinform on/against somebody phrasal verb formalPMSCPto tell the police or an enemy information about someone that will harm them He denied that he had ever informed on his neighbours. inform→ See Verb table
Examples from the Corpus
inform on/against And they had to be kept informed on a regular basis about changes in the competitive picture and performance expectations.He was well informed on civil and constitutional law.His father was a quiet man, but he was surprisingly well informed on current issues.Luke O'Malley had committed the unforgivable sin - he had informed on his friends.It was the press that later seemed to always side with the blacks, informing on police who committed excesses.The zeal to conform and inform on their neighbours gave the Inquisition many willing helpers.He also was quickly released, but he informed on two other well-known villains, MacDonald and Collins.How all occasions do inform against you, George!
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Verb table
inform
Simple Form
Present
I, you, we, theyinform
he, she, itinforms
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Past
I, you, he, she, it, we, theyinformed
Present perfect
I, you, we, theyhave informed
he, she, ithas informed
Past perfect
I, you, he, she, it, we, theyhad informed
Future
I, you, he, she, it, we, theywill inform
Future perfect
I, you, he, she, it, we, theywill have informed
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Continuous Form
Present
Iam informing
he, she, itis informing
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you, we, theyare informing
Past
I, he, she, itwas informing
you, we, theywere informing
Present perfect
I, you, we, theyhave been informing
he, she, ithas been informing
Past perfect
I, you, he, she, it, we, theyhad been informing
Future
I, you, he, she, it, we, theywill be informing
Future perfect
I, you, he, she, it, we, theywill have been informing
> View Less