to lengthen
Regular verb: lengthen - lengthened- lengthened

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
I lengthen
you lengthen
he lengthens
we lengthen
you lengthen
they lengthen 	I'mlengthening
you'relengthening
he'slengthening
we'relengthening
you'relengthening
they'relengthening	I lengthened
you lengthened
he lengthened
we lengthened
you lengthened
they lengthened	Iwaslengthening
youwerelengthening
hewaslengthening
wewerelengthening
youwerelengthening
theywerelengthening	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
I've lengthened
you've lengthened
he's lengthened
we've lengthened
you've lengthened
they've lengthened	I'vebeen lengthening
you'vebeen lengthening
he'sbeen lengthening
we'vebeen lengthening
you'vebeen lengthening
they'vebeen lengthening	I'd lengthened
you'd lengthened
he'd lengthened
we'd lengthened
you'd lengthened
they'd lengthened	I'd been lengthening
you'd been lengthening
he'd been lengthening
we'd been lengthening
you'd been lengthening
they'd been lengthening	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
I'll lengthen
you'll lengthen
he'll lengthen
we'll lengthen
you'll lengthen
they'll lengthen 	I'll be lengthening
you'll be lengthening
he'll be lengthening
we'll be lengthening
you'll be lengthening
they'll be lengthening	I'll have lengthened
you'll have lengthened
he'll have lengthened
we'll have lengthened
you'll have lengthened
they'll have lengthened	I'll have been lengthening
you'll have been lengthening
he'll have been lengthening
we'll have been lengthening
you'll have been lengthening
they'll have been lengthening	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
I'd lengthen
you'd lengthen
he'd lengthen
we'd lengthen
you'd lengthen
they'd lengthen 	I'd be lengthening
you'd be lengthening
he'd be lengthening
we'd be lengthening
you'd be lengthening
they'd be lengthening	I'd have lengthened
you'd have lengthened
he'd have lengthened
we'd have lengthened
you'd have lengthened
they'd have lengthened	I'd have been lengthening
you'd have been lengthening
he'd have been lengthening
we'd have been lengthening
you'd have been lengthening
they'd have been lengthening	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to lengthen 	 	lengthen
Let's lengthen
lengthen 	 	

Participle 	
Present 	Past 	 	 	
lengthening	lengthened