must presharpen
Verbo regular: presharpen - presharpened- presharpened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must presharpen
you must presharpen
he must presharpen
we must presharpen
you must presharpen
they must presharpen 	I must be presharpening
you must be presharpening
he must be presharpening
we must be presharpening
you must be presharpening
they must be presharpening	I must have presharpened
you must have presharpened
he must have presharpened
we must have presharpened
you must have presharpened
they must have presharpened	I must have been presharpening
you must have been presharpening
he must have been presharpening
we must have been presharpening
you must have been presharpening
they must have been presharpening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not presharpen
you must not presharpen
he must not presharpen
we must not presharpen
you must not presharpen
they must not presharpen 	I must not be presharpening
you must not be presharpening
he must not be presharpening
we must not be presharpening
you must not be presharpening
they must not be presharpening	I must not have presharpened
you must not have presharpened
he must not have presharpened
we must not have presharpened
you must not have presharpened
they must not have presharpened	I must not have been presharpening
you must not have been presharpening
he must not have been presharpening
we must not have been presharpening
you must not have been presharpening
they must not have been presharpening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I presharpen?
must you presharpen?
must he presharpen?
must we presharpen?
must you presharpen?
must they presharpen? 	must I be presharpening?
must you be presharpening?
must he be presharpening?
must we be presharpening?
must you be presharpening?
must they be presharpening? 	must I have presharpened?
must you have presharpened?
must he have presharpened?
must we have presharpened?
must you have presharpened?
must they have presharpened? 	must I have been presharpening?
must you have been presharpening?
must he have been presharpening?
must we have been presharpening?
must you have been presharpening?
must they have been presharpening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not presharpen?
must you not presharpen?
must he not presharpen?
must we not presharpen?
must you not presharpen?
must they not presharpen? 	must I not be presharpening?
must you not be presharpening?
must he not be presharpening?
must we not be presharpening?
must you not be presharpening?
must they not be presharpening? 	must I not have presharpened?
must you not have presharpened?
must he not have presharpened?
must we not have presharpened?
must you not have presharpened?
must they not have presharpened? 	must I not have been presharpening?
must you not have been presharpening?
must he not have been presharpening?
must we not have been presharpening?
must you not have been presharpening?
must they not have been presharpening?