could crepitate
Regular verb: crepitate - crepitated- crepitated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could crepitate
you could crepitate
he could crepitate
we could crepitate
you could crepitate
they could crepitate 	I could be crepitating
you could be crepitating
he could be crepitating
we could be crepitating
you could be crepitating
they could be crepitating	I could have crepitated
you could have crepitated
he could have crepitated
we could have crepitated
you could have crepitated
they could have crepitated	I could have been crepitating
you could have been crepitating
he could have been crepitating
we could have been crepitating
you could have been crepitating
they could have been crepitating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't crepitate
you couldn't crepitate
he couldn't crepitate
we couldn't crepitate
you couldn't crepitate
they couldn't crepitate 	I couldn't be crepitating
you couldn't be crepitating
he couldn't be crepitating
we couldn't be crepitating
you couldn't be crepitating
they couldn't be crepitating	I couldn't have crepitated
you couldn't have crepitated
he couldn't have crepitated
we couldn't have crepitated
you couldn't have crepitated
they couldn't have crepitated	I couldn't have been crepitating
you couldn't have been crepitating
he couldn't have been crepitating
we couldn't have been crepitating
you couldn't have been crepitating
they couldn't have been crepitating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I crepitate?
could you crepitate?
could he crepitate?
could we crepitate?
could you crepitate?
could they crepitate? 	could I be crepitating?
could you be crepitating?
could he be crepitating?
could we be crepitating?
could you be crepitating?
could they be crepitating? 	could I have crepitated?
could you have crepitated?
could he have crepitated?
could we have crepitated?
could you have crepitated?
could they have crepitated? 	could I have been crepitating?
could you have been crepitating?
could he have been crepitating?
could we have been crepitating?
could you have been crepitating?
could they have been crepitating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I crepitate?
couldn't you crepitate?
couldn't he crepitate?
couldn't we crepitate?
couldn't you crepitate?
couldn't they crepitate? 	couldn't I be crepitating?
couldn't you be crepitating?
couldn't he be crepitating?
couldn't we be crepitating?
couldn't you be crepitating?
couldn't they be crepitating? 	couldn't I have crepitated?
couldn't you have crepitated?
couldn't he have crepitated?
couldn't we have crepitated?
couldn't you have crepitated?
couldn't they have crepitated? 	couldn't I have been crepitating?
couldn't you have been crepitating?
couldn't he have been crepitating?
couldn't we have been crepitating?
couldn't you have been crepitating?
couldn't they have been crepitating?