could overabstract
Regular verb: overabstract - overabstracted- overabstracted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could overabstract
you could overabstract
he could overabstract
we could overabstract
you could overabstract
they could overabstract 	I could be overabstracting
you could be overabstracting
he could be overabstracting
we could be overabstracting
you could be overabstracting
they could be overabstracting	I could have overabstracted
you could have overabstracted
he could have overabstracted
we could have overabstracted
you could have overabstracted
they could have overabstracted	I could have been overabstracting
you could have been overabstracting
he could have been overabstracting
we could have been overabstracting
you could have been overabstracting
they could have been overabstracting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't overabstract
you couldn't overabstract
he couldn't overabstract
we couldn't overabstract
you couldn't overabstract
they couldn't overabstract 	I couldn't be overabstracting
you couldn't be overabstracting
he couldn't be overabstracting
we couldn't be overabstracting
you couldn't be overabstracting
they couldn't be overabstracting	I couldn't have overabstracted
you couldn't have overabstracted
he couldn't have overabstracted
we couldn't have overabstracted
you couldn't have overabstracted
they couldn't have overabstracted	I couldn't have been overabstracting
you couldn't have been overabstracting
he couldn't have been overabstracting
we couldn't have been overabstracting
you couldn't have been overabstracting
they couldn't have been overabstracting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I overabstract?
could you overabstract?
could he overabstract?
could we overabstract?
could you overabstract?
could they overabstract? 	could I be overabstracting?
could you be overabstracting?
could he be overabstracting?
could we be overabstracting?
could you be overabstracting?
could they be overabstracting? 	could I have overabstracted?
could you have overabstracted?
could he have overabstracted?
could we have overabstracted?
could you have overabstracted?
could they have overabstracted? 	could I have been overabstracting?
could you have been overabstracting?
could he have been overabstracting?
could we have been overabstracting?
could you have been overabstracting?
could they have been overabstracting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I overabstract?
couldn't you overabstract?
couldn't he overabstract?
couldn't we overabstract?
couldn't you overabstract?
couldn't they overabstract? 	couldn't I be overabstracting?
couldn't you be overabstracting?
couldn't he be overabstracting?
couldn't we be overabstracting?
couldn't you be overabstracting?
couldn't they be overabstracting? 	couldn't I have overabstracted?
couldn't you have overabstracted?
couldn't he have overabstracted?
couldn't we have overabstracted?
couldn't you have overabstracted?
couldn't they have overabstracted? 	couldn't I have been overabstracting?
couldn't you have been overabstracting?
couldn't he have been overabstracting?
couldn't we have been overabstracting?
couldn't you have been overabstracting?
couldn't they have been overabstracting?