English version

tighten up

From Longman Dictionary of Contemporary Englishtighten up phrasal verbif a team or group tightens up, they start working together more effectivelytighten something ↔ up We have tightened up the defence and are winning matches as a result. tighten→ See Verb table
Examples from the Corpus
tighten upThe music industry is determined to tighten up on the illegal copying of CDs.The prime minister has promised to tighten up the law on carbon dioxide emissions.
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Verb table
tighten
Simple Form
Present
I, you, we, theytighten
he, she, ittightens
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Past
I, you, he, she, it, we, theytightened
Present perfect
I, you, we, theyhave tightened
he, she, ithas tightened
Past perfect
I, you, he, she, it, we, theyhad tightened
Future
I, you, he, she, it, we, theywill tighten
Future perfect
I, you, he, she, it, we, theywill have tightened
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Continuous Form
Present
Iam tightening
he, she, itis tightening
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you, we, theyare tightening
Past
I, he, she, itwas tightening
you, we, theywere tightening
Present perfect
I, you, we, theyhave been tightening
he, she, ithas been tightening
Past perfect
I, you, he, she, it, we, theyhad been tightening
Future
I, you, he, she, it, we, theywill be tightening
Future perfect
I, you, he, she, it, we, theywill have been tightening
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