should sharpen
Verbo regular: sharpen - sharpened- sharpened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should sharpen
you should sharpen
she should sharpen
we should sharpen
you should sharpen
they should sharpen 	I should be sharpening
you should be sharpening
she should be sharpening
we should be sharpening
you should be sharpening
they should be sharpening	I should have sharpened
you should have sharpened
she should have sharpened
we should have sharpened
you should have sharpened
they should have sharpened	I should have been sharpening
you should have been sharpening
she should have been sharpening
we should have been sharpening
you should have been sharpening
they should have been sharpening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should not sharpen
you should not sharpen
she should not sharpen
we should not sharpen
you should not sharpen
they should not sharpen 	I should not be sharpening
you should not be sharpening
she should not be sharpening
we should not be sharpening
you should not be sharpening
they should not be sharpening	I should not have sharpened
you should not have sharpened
she should not have sharpened
we should not have sharpened
you should not have sharpened
they should not have sharpened	I should not have been sharpening
you should not have been sharpening
she should not have been sharpening
we should not have been sharpening
you should not have been sharpening
they should not have been sharpening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I sharpen?
should you sharpen?
should she sharpen?
should we sharpen?
should you sharpen?
should they sharpen? 	should I be sharpening?
should you be sharpening?
should she be sharpening?
should we be sharpening?
should you be sharpening?
should they be sharpening? 	should I have sharpened?
should you have sharpened?
should she 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 she 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 	
should I not sharpen?
should you not sharpen?
should she not sharpen?
should we not sharpen?
should you not sharpen?
should they not sharpen? 	should I not be sharpening?
should you not be sharpening?
should she not be sharpening?
should we not be sharpening?
should you not be sharpening?
should they not be sharpening? 	should I not have sharpened?
should you not have sharpened?
should she not have sharpened?
should we not have sharpened?
should you not have sharpened?
should they not have sharpened? 	should I not have been sharpening?
should you not have been sharpening?
should she not have been sharpening?
should we not have been sharpening?
should you not have been sharpening?
should they not have been sharpening?