could decrepitate
Regular verb: decrepitate - decrepitated- decrepitated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could decrepitate
you could decrepitate
she could decrepitate
we could decrepitate
you could decrepitate
they could decrepitate 	I could be decrepitating
you could be decrepitating
she could be decrepitating
we could be decrepitating
you could be decrepitating
they could be decrepitating	I could have decrepitated
you could have decrepitated
she could have decrepitated
we could have decrepitated
you could have decrepitated
they could have decrepitated	I could have been decrepitating
you could have been decrepitating
she could have been decrepitating
we could have been decrepitating
you could have been decrepitating
they could have been decrepitating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not decrepitate
you could not decrepitate
she could not decrepitate
we could not decrepitate
you could not decrepitate
they could not decrepitate 	I could not be decrepitating
you could not be decrepitating
she could not be decrepitating
we could not be decrepitating
you could not be decrepitating
they could not be decrepitating	I could not have decrepitated
you could not have decrepitated
she could not have decrepitated
we could not have decrepitated
you could not have decrepitated
they could not have decrepitated	I could not have been decrepitating
you could not have been decrepitating
she could not have been decrepitating
we could not have been decrepitating
you could not have been decrepitating
they could not have been decrepitating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I decrepitate?
could you decrepitate?
could she decrepitate?
could we decrepitate?
could you decrepitate?
could they decrepitate? 	could I be decrepitating?
could you be decrepitating?
could she be decrepitating?
could we be decrepitating?
could you be decrepitating?
could they be decrepitating? 	could I have decrepitated?
could you have decrepitated?
could she have decrepitated?
could we have decrepitated?
could you have decrepitated?
could they have decrepitated? 	could I have been decrepitating?
could you have been decrepitating?
could she have been decrepitating?
could we have been decrepitating?
could you have been decrepitating?
could they have been decrepitating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not decrepitate?
could you not decrepitate?
could she not decrepitate?
could we not decrepitate?
could you not decrepitate?
could they not decrepitate? 	could I not be decrepitating?
could you not be decrepitating?
could she not be decrepitating?
could we not be decrepitating?
could you not be decrepitating?
could they not be decrepitating? 	could I not have decrepitated?
could you not have decrepitated?
could she not have decrepitated?
could we not have decrepitated?
could you not have decrepitated?
could they not have decrepitated? 	could I not have been decrepitating?
could you not have been decrepitating?
could she not have been decrepitating?
could we not have been decrepitating?
could you not have been decrepitating?
could they not have been decrepitating?