to trephine
Regular verb: trephine - trephined- trephined

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
I trephine
you trephine
he trephines
we trephine
you trephine
they trephine 	I'mtrephining
you'retrephining
he'strephining
we'retrephining
you'retrephining
they'retrephining	I trephined
you trephined
he trephined
we trephined
you trephined
they trephined	Iwastrephining
youweretrephining
hewastrephining
weweretrephining
youweretrephining
theyweretrephining	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
I've trephined
you've trephined
he's trephined
we've trephined
you've trephined
they've trephined	I'vebeen trephining
you'vebeen trephining
he'sbeen trephining
we'vebeen trephining
you'vebeen trephining
they'vebeen trephining	I'd trephined
you'd trephined
he'd trephined
we'd trephined
you'd trephined
they'd trephined	I'd been trephining
you'd been trephining
he'd been trephining
we'd been trephining
you'd been trephining
they'd been trephining	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
I'll trephine
you'll trephine
he'll trephine
we'll trephine
you'll trephine
they'll trephine 	I'll be trephining
you'll be trephining
he'll be trephining
we'll be trephining
you'll be trephining
they'll be trephining	I'll have trephined
you'll have trephined
he'll have trephined
we'll have trephined
you'll have trephined
they'll have trephined	I'll have been trephining
you'll have been trephining
he'll have been trephining
we'll have been trephining
you'll have been trephining
they'll have been trephining	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
I'd trephine
you'd trephine
he'd trephine
we'd trephine
you'd trephine
they'd trephine 	I'd be trephining
you'd be trephining
he'd be trephining
we'd be trephining
you'd be trephining
they'd be trephining	I'd have trephined
you'd have trephined
he'd have trephined
we'd have trephined
you'd have trephined
they'd have trephined	I'd have been trephining
you'd have been trephining
he'd have been trephining
we'd have been trephining
you'd have been trephining
they'd have been trephining	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to trephine 	 	trephine
Let's trephine
trephine 	 	

Participle 	
Present 	Past 	 	 	
trephining	trephined