could overinflate
Regular verb: overinflate - overinflated- overinflated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could overinflate
you could overinflate
he could overinflate
we could overinflate
you could overinflate
they could overinflate 	I could be overinflating
you could be overinflating
he could be overinflating
we could be overinflating
you could be overinflating
they could be overinflating	I could have overinflated
you could have overinflated
he could have overinflated
we could have overinflated
you could have overinflated
they could have overinflated	I could have been overinflating
you could have been overinflating
he could have been overinflating
we could have been overinflating
you could have been overinflating
they could have been overinflating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't overinflate
you couldn't overinflate
he couldn't overinflate
we couldn't overinflate
you couldn't overinflate
they couldn't overinflate 	I couldn't be overinflating
you couldn't be overinflating
he couldn't be overinflating
we couldn't be overinflating
you couldn't be overinflating
they couldn't be overinflating	I couldn't have overinflated
you couldn't have overinflated
he couldn't have overinflated
we couldn't have overinflated
you couldn't have overinflated
they couldn't have overinflated	I couldn't have been overinflating
you couldn't have been overinflating
he couldn't have been overinflating
we couldn't have been overinflating
you couldn't have been overinflating
they couldn't have been overinflating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I overinflate?
could you overinflate?
could he overinflate?
could we overinflate?
could you overinflate?
could they overinflate? 	could I be overinflating?
could you be overinflating?
could he be overinflating?
could we be overinflating?
could you be overinflating?
could they be overinflating? 	could I have overinflated?
could you have overinflated?
could he have overinflated?
could we have overinflated?
could you have overinflated?
could they have overinflated? 	could I have been overinflating?
could you have been overinflating?
could he have been overinflating?
could we have been overinflating?
could you have been overinflating?
could they have been overinflating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I overinflate?
couldn't you overinflate?
couldn't he overinflate?
couldn't we overinflate?
couldn't you overinflate?
couldn't they overinflate? 	couldn't I be overinflating?
couldn't you be overinflating?
couldn't he be overinflating?
couldn't we be overinflating?
couldn't you be overinflating?
couldn't they be overinflating? 	couldn't I have overinflated?
couldn't you have overinflated?
couldn't he have overinflated?
couldn't we have overinflated?
couldn't you have overinflated?
couldn't they have overinflated? 	couldn't I have been overinflating?
couldn't you have been overinflating?
couldn't he have been overinflating?
couldn't we have been overinflating?
couldn't you have been overinflating?
couldn't they have been overinflating?