to knuckle
Regular verb: knuckle - knuckled- knuckled

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
I knuckle
you knuckle
he knuckles
we knuckle
you knuckle
they knuckle 	I'mknuckling
you'reknuckling
he'sknuckling
we'reknuckling
you'reknuckling
they'reknuckling	I knuckled
you knuckled
he knuckled
we knuckled
you knuckled
they knuckled	Iwasknuckling
youwereknuckling
hewasknuckling
wewereknuckling
youwereknuckling
theywereknuckling	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
I've knuckled
you've knuckled
he's knuckled
we've knuckled
you've knuckled
they've knuckled	I'vebeen knuckling
you'vebeen knuckling
he'sbeen knuckling
we'vebeen knuckling
you'vebeen knuckling
they'vebeen knuckling	I'd knuckled
you'd knuckled
he'd knuckled
we'd knuckled
you'd knuckled
they'd knuckled	I'd been knuckling
you'd been knuckling
he'd been knuckling
we'd been knuckling
you'd been knuckling
they'd been knuckling	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
I'll knuckle
you'll knuckle
he'll knuckle
we'll knuckle
you'll knuckle
they'll knuckle 	I'll be knuckling
you'll be knuckling
he'll be knuckling
we'll be knuckling
you'll be knuckling
they'll be knuckling	I'll have knuckled
you'll have knuckled
he'll have knuckled
we'll have knuckled
you'll have knuckled
they'll have knuckled	I'll have been knuckling
you'll have been knuckling
he'll have been knuckling
we'll have been knuckling
you'll have been knuckling
they'll have been knuckling	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
I'd knuckle
you'd knuckle
he'd knuckle
we'd knuckle
you'd knuckle
they'd knuckle 	I'd be knuckling
you'd be knuckling
he'd be knuckling
we'd be knuckling
you'd be knuckling
they'd be knuckling	I'd have knuckled
you'd have knuckled
he'd have knuckled
we'd have knuckled
you'd have knuckled
they'd have knuckled	I'd have been knuckling
you'd have been knuckling
he'd have been knuckling
we'd have been knuckling
you'd have been knuckling
they'd have been knuckling	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to knuckle 	 	knuckle
Let's knuckle
knuckle 	 	

Participle 	
Present 	Past 	 	 	
knuckling	knuckled