should sharpen
Verbo regular: sharpen - sharpened- sharpened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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 should've sharpened
you should've sharpened
he should've sharpened
we should've sharpened
you should've sharpened
they should've sharpened	I should've been sharpening
you should've been sharpening
he should've been sharpening
we should've been sharpening
you should've been sharpening
they should've been sharpening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shouldn't sharpen
you shouldn't sharpen
he shouldn't sharpen
we shouldn't sharpen
you shouldn't sharpen
they shouldn't sharpen 	I shouldn't be sharpening
you shouldn't be sharpening
he shouldn't be sharpening
we shouldn't be sharpening
you shouldn't be sharpening
they shouldn't be sharpening	I shouldn't have sharpened
you shouldn't have sharpened
he shouldn't have sharpened
we shouldn't have sharpened
you shouldn't have sharpened
they shouldn't have sharpened	I shouldn't have been sharpening
you shouldn't have been sharpening
he shouldn't have been sharpening
we shouldn't have been sharpening
you shouldn't have been sharpening
they shouldn't have been sharpening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I sharpen?
should you sharpen?
should he sharpen?
should we sharpen?
should you sharpen?
should they sharpen? 	should I be sharpening?
should you be sharpening?
should he be sharpening?
should we be sharpening?
should you be sharpening?
should they be sharpening? 	should I have sharpened?
should you have sharpened?
should he have sharpened?
should we have sharpened?
should you have sharpened?
should they have sharpened? 	should I have been sharpening?
should you have been sharpening?
should he have been sharpening?
should we have been sharpening?
should you have been sharpening?
should they have been sharpening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shouldn't I sharpen?
shouldn't you sharpen?
shouldn't he sharpen?
shouldn't we sharpen?
shouldn't you sharpen?
shouldn't they sharpen? 	shouldn't I be sharpening?
shouldn't you be sharpening?
shouldn't he be sharpening?
shouldn't we be sharpening?
shouldn't you be sharpening?
shouldn't they be sharpening? 	shouldn't I have sharpened?
shouldn't you have sharpened?
shouldn't he have sharpened?
shouldn't we have sharpened?
shouldn't you have sharpened?
shouldn't they have sharpened? 	shouldn't I have been sharpening?
shouldn't you have been sharpening?
shouldn't he have been sharpening?
shouldn't we have been sharpening?
shouldn't you have been sharpening?
shouldn't they have been sharpening?