to bitter
Regular verb: bitter - bittered- bittered

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
I bitter
you bitter
he bitters
we bitter
you bitter
they bitter 	I'mbittering
you'rebittering
he'sbittering
we'rebittering
you'rebittering
they'rebittering	I bittered
you bittered
he bittered
we bittered
you bittered
they bittered	Iwasbittering
youwerebittering
hewasbittering
wewerebittering
youwerebittering
theywerebittering	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
I've bittered
you've bittered
he's bittered
we've bittered
you've bittered
they've bittered	I'vebeen bittering
you'vebeen bittering
he'sbeen bittering
we'vebeen bittering
you'vebeen bittering
they'vebeen bittering	I'd bittered
you'd bittered
he'd bittered
we'd bittered
you'd bittered
they'd bittered	I'd been bittering
you'd been bittering
he'd been bittering
we'd been bittering
you'd been bittering
they'd been bittering	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
I'll bitter
you'll bitter
he'll bitter
we'll bitter
you'll bitter
they'll bitter 	I'll be bittering
you'll be bittering
he'll be bittering
we'll be bittering
you'll be bittering
they'll be bittering	I'll have bittered
you'll have bittered
he'll have bittered
we'll have bittered
you'll have bittered
they'll have bittered	I'll have been bittering
you'll have been bittering
he'll have been bittering
we'll have been bittering
you'll have been bittering
they'll have been bittering	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
I'd bitter
you'd bitter
he'd bitter
we'd bitter
you'd bitter
they'd bitter 	I'd be bittering
you'd be bittering
he'd be bittering
we'd be bittering
you'd be bittering
they'd be bittering	I'd have bittered
you'd have bittered
he'd have bittered
we'd have bittered
you'd have bittered
they'd have bittered	I'd have been bittering
you'd have been bittering
he'd have been bittering
we'd have been bittering
you'd have been bittering
they'd have been bittering	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to bitter 	 	bitter
Let's bitter
bitter 	 	

Participle 	
Present 	Past 	 	 	
bittering	bittered