could exacerbate
Regular verb: exacerbate - exacerbated- exacerbated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could exacerbate
you could exacerbate
he could exacerbate
we could exacerbate
you could exacerbate
they could exacerbate 	I could be exacerbating
you could be exacerbating
he could be exacerbating
we could be exacerbating
you could be exacerbating
they could be exacerbating	I could have exacerbated
you could have exacerbated
he could have exacerbated
we could have exacerbated
you could have exacerbated
they could have exacerbated	I could have been exacerbating
you could have been exacerbating
he could have been exacerbating
we could have been exacerbating
you could have been exacerbating
they could have been exacerbating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't exacerbate
you couldn't exacerbate
he couldn't exacerbate
we couldn't exacerbate
you couldn't exacerbate
they couldn't exacerbate 	I couldn't be exacerbating
you couldn't be exacerbating
he couldn't be exacerbating
we couldn't be exacerbating
you couldn't be exacerbating
they couldn't be exacerbating	I couldn't have exacerbated
you couldn't have exacerbated
he couldn't have exacerbated
we couldn't have exacerbated
you couldn't have exacerbated
they couldn't have exacerbated	I couldn't have been exacerbating
you couldn't have been exacerbating
he couldn't have been exacerbating
we couldn't have been exacerbating
you couldn't have been exacerbating
they couldn't have been exacerbating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I exacerbate?
could you exacerbate?
could he exacerbate?
could we exacerbate?
could you exacerbate?
could they exacerbate? 	could I be exacerbating?
could you be exacerbating?
could he be exacerbating?
could we be exacerbating?
could you be exacerbating?
could they be exacerbating? 	could I have exacerbated?
could you have exacerbated?
could he have exacerbated?
could we have exacerbated?
could you have exacerbated?
could they have exacerbated? 	could I have been exacerbating?
could you have been exacerbating?
could he have been exacerbating?
could we have been exacerbating?
could you have been exacerbating?
could they have been exacerbating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I exacerbate?
couldn't you exacerbate?
couldn't he exacerbate?
couldn't we exacerbate?
couldn't you exacerbate?
couldn't they exacerbate? 	couldn't I be exacerbating?
couldn't you be exacerbating?
couldn't he be exacerbating?
couldn't we be exacerbating?
couldn't you be exacerbating?
couldn't they be exacerbating? 	couldn't I have exacerbated?
couldn't you have exacerbated?
couldn't he have exacerbated?
couldn't we have exacerbated?
couldn't you have exacerbated?
couldn't they have exacerbated? 	couldn't I have been exacerbating?
couldn't you have been exacerbating?
couldn't he have been exacerbating?
couldn't we have been exacerbating?
couldn't you have been exacerbating?
couldn't they have been exacerbating?