must decrepitate
Verbo regular: decrepitate - decrepitated- decrepitated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must decrepitate
you must decrepitate
he must decrepitate
we must decrepitate
you must decrepitate
they must decrepitate 	I must be decrepitating
you must be decrepitating
he must be decrepitating
we must be decrepitating
you must be decrepitating
they must be decrepitating	I must have decrepitated
you must have decrepitated
he must have decrepitated
we must have decrepitated
you must have decrepitated
they must have decrepitated	I must have been decrepitating
you must have been decrepitating
he must have been decrepitating
we must have been decrepitating
you must have been decrepitating
they must have been decrepitating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not decrepitate
you must not decrepitate
he must not decrepitate
we must not decrepitate
you must not decrepitate
they must not decrepitate 	I must not be decrepitating
you must not be decrepitating
he must not be decrepitating
we must not be decrepitating
you must not be decrepitating
they must not be decrepitating	I must not have decrepitated
you must not have decrepitated
he must not have decrepitated
we must not have decrepitated
you must not have decrepitated
they must not have decrepitated	I must not have been decrepitating
you must not have been decrepitating
he must not have been decrepitating
we must not have been decrepitating
you must not have been decrepitating
they must not have been decrepitating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I decrepitate?
must you decrepitate?
must he decrepitate?
must we decrepitate?
must you decrepitate?
must they decrepitate? 	must I be decrepitating?
must you be decrepitating?
must he be decrepitating?
must we be decrepitating?
must you be decrepitating?
must they be decrepitating? 	must I have decrepitated?
must you have decrepitated?
must he have decrepitated?
must we have decrepitated?
must you have decrepitated?
must they have decrepitated? 	must I have been decrepitating?
must you have been decrepitating?
must he have been decrepitating?
must we have been decrepitating?
must you have been decrepitating?
must they have been decrepitating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not decrepitate?
must you not decrepitate?
must he not decrepitate?
must we not decrepitate?
must you not decrepitate?
must they not decrepitate? 	must I not be decrepitating?
must you not be decrepitating?
must he not be decrepitating?
must we not be decrepitating?
must you not be decrepitating?
must they not be decrepitating? 	must I not have decrepitated?
must you not have decrepitated?
must he not have decrepitated?
must we not have decrepitated?
must you not have decrepitated?
must they not have decrepitated? 	must I not have been decrepitating?
must you not have been decrepitating?
must he not have been decrepitating?
must we not have been decrepitating?
must you not have been decrepitating?
must they not have been decrepitating?