to tighten
Regular verb: tighten - tightened- tightened

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
I tighten
you tighten
he tightens
we tighten
you tighten
they tighten 	I'mtightening
you'retightening
he'stightening
we'retightening
you'retightening
they'retightening	I tightened
you tightened
he tightened
we tightened
you tightened
they tightened	Iwastightening
youweretightening
hewastightening
weweretightening
youweretightening
theyweretightening	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
I've tightened
you've tightened
he's tightened
we've tightened
you've tightened
they've tightened	I'vebeen tightening
you'vebeen tightening
he'sbeen tightening
we'vebeen tightening
you'vebeen tightening
they'vebeen tightening	I'd tightened
you'd tightened
he'd tightened
we'd tightened
you'd tightened
they'd tightened	I'd been tightening
you'd been tightening
he'd been tightening
we'd been tightening
you'd been tightening
they'd been tightening	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
I'll tighten
you'll tighten
he'll tighten
we'll tighten
you'll tighten
they'll tighten 	I'll be tightening
you'll be tightening
he'll be tightening
we'll be tightening
you'll be tightening
they'll be tightening	I'll have tightened
you'll have tightened
he'll have tightened
we'll have tightened
you'll have tightened
they'll have tightened	I'll have been tightening
you'll have been tightening
he'll have been tightening
we'll have been tightening
you'll have been tightening
they'll have been tightening	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
I'd tighten
you'd tighten
he'd tighten
we'd tighten
you'd tighten
they'd tighten 	I'd be tightening
you'd be tightening
he'd be tightening
we'd be tightening
you'd be tightening
they'd be tightening	I'd have tightened
you'd have tightened
he'd have tightened
we'd have tightened
you'd have tightened
they'd have tightened	I'd have been tightening
you'd have been tightening
he'd have been tightening
we'd have been tightening
you'd have been tightening
they'd have been tightening	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to tighten 	 	tighten
Let's tighten
tighten 	 	

Participle 	
Present 	Past 	 	 	
tightening	tightened