must crispen
Verbo regular: crispen - crispened- crispened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must crispen
you must crispen
he must crispen
we must crispen
you must crispen
they must crispen 	I must be crispening
you must be crispening
he must be crispening
we must be crispening
you must be crispening
they must be crispening	I must have crispened
you must have crispened
he must have crispened
we must have crispened
you must have crispened
they must have crispened	I must have been crispening
you must have been crispening
he must have been crispening
we must have been crispening
you must have been crispening
they must have been crispening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not crispen
you must not crispen
he must not crispen
we must not crispen
you must not crispen
they must not crispen 	I must not be crispening
you must not be crispening
he must not be crispening
we must not be crispening
you must not be crispening
they must not be crispening	I must not have crispened
you must not have crispened
he must not have crispened
we must not have crispened
you must not have crispened
they must not have crispened	I must not have been crispening
you must not have been crispening
he must not have been crispening
we must not have been crispening
you must not have been crispening
they must not have been crispening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I crispen?
must you crispen?
must he crispen?
must we crispen?
must you crispen?
must they crispen? 	must I be crispening?
must you be crispening?
must he be crispening?
must we be crispening?
must you be crispening?
must they be crispening? 	must I have crispened?
must you have crispened?
must he have crispened?
must we have crispened?
must you have crispened?
must they have crispened? 	must I have been crispening?
must you have been crispening?
must he have been crispening?
must we have been crispening?
must you have been crispening?
must they have been crispening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not crispen?
must you not crispen?
must he not crispen?
must we not crispen?
must you not crispen?
must they not crispen? 	must I not be crispening?
must you not be crispening?
must he not be crispening?
must we not be crispening?
must you not be crispening?
must they not be crispening? 	must I not have crispened?
must you not have crispened?
must he not have crispened?
must we not have crispened?
must you not have crispened?
must they not have crispened? 	must I not have been crispening?
must you not have been crispening?
must he not have been crispening?
must we not have been crispening?
must you not have been crispening?
must they not have been crispening?