to sharpen
Regular verb: sharpen - sharpened- sharpened

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
I sharpen
you sharpen
he sharpens
we sharpen
you sharpen
they sharpen 	I'msharpening
you'resharpening
he'ssharpening
we'resharpening
you'resharpening
they'resharpening	I sharpened
you sharpened
he sharpened
we sharpened
you sharpened
they sharpened	Iwassharpening
youweresharpening
hewassharpening
weweresharpening
youweresharpening
theyweresharpening	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
I've sharpened
you've sharpened
he's sharpened
we've sharpened
you've sharpened
they've sharpened	I'vebeen sharpening
you'vebeen sharpening
he'sbeen sharpening
we'vebeen sharpening
you'vebeen sharpening
they'vebeen sharpening	I'd sharpened
you'd sharpened
he'd sharpened
we'd sharpened
you'd sharpened
they'd sharpened	I'd been sharpening
you'd been sharpening
he'd been sharpening
we'd been sharpening
you'd been sharpening
they'd been sharpening	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
I'll sharpen
you'll sharpen
he'll sharpen
we'll sharpen
you'll sharpen
they'll sharpen 	I'll be sharpening
you'll be sharpening
he'll be sharpening
we'll be sharpening
you'll be sharpening
they'll be sharpening	I'll have sharpened
you'll have sharpened
he'll have sharpened
we'll have sharpened
you'll have sharpened
they'll have sharpened	I'll have been sharpening
you'll have been sharpening
he'll have been sharpening
we'll have been sharpening
you'll have been sharpening
they'll have been sharpening	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
I'd sharpen
you'd sharpen
he'd sharpen
we'd sharpen
you'd sharpen
they'd sharpen 	I'd be sharpening
you'd be sharpening
he'd be sharpening
we'd be sharpening
you'd be sharpening
they'd be sharpening	I'd have sharpened
you'd have sharpened
he'd have sharpened
we'd have sharpened
you'd have sharpened
they'd have sharpened	I'd have been sharpening
you'd have been sharpening
he'd have been sharpening
we'd have been sharpening
you'd have been sharpening
they'd have been sharpening	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to sharpen 	 	sharpen
Let's sharpen
sharpen 	 	

Participle 	
Present 	Past 	 	 	
sharpening	sharpened