could overconcentrate
Regular verb: overconcentrate - overconcentrated- overconcentrated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could overconcentrate
you could overconcentrate
he could overconcentrate
we could overconcentrate
you could overconcentrate
they could overconcentrate 	I could be overconcentrating
you could be overconcentrating
he could be overconcentrating
we could be overconcentrating
you could be overconcentrating
they could be overconcentrating	I could have overconcentrated
you could have overconcentrated
he could have overconcentrated
we could have overconcentrated
you could have overconcentrated
they could have overconcentrated	I could have been overconcentrating
you could have been overconcentrating
he could have been overconcentrating
we could have been overconcentrating
you could have been overconcentrating
they could have been overconcentrating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't overconcentrate
you couldn't overconcentrate
he couldn't overconcentrate
we couldn't overconcentrate
you couldn't overconcentrate
they couldn't overconcentrate 	I couldn't be overconcentrating
you couldn't be overconcentrating
he couldn't be overconcentrating
we couldn't be overconcentrating
you couldn't be overconcentrating
they couldn't be overconcentrating	I couldn't have overconcentrated
you couldn't have overconcentrated
he couldn't have overconcentrated
we couldn't have overconcentrated
you couldn't have overconcentrated
they couldn't have overconcentrated	I couldn't have been overconcentrating
you couldn't have been overconcentrating
he couldn't have been overconcentrating
we couldn't have been overconcentrating
you couldn't have been overconcentrating
they couldn't have been overconcentrating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I overconcentrate?
could you overconcentrate?
could he overconcentrate?
could we overconcentrate?
could you overconcentrate?
could they overconcentrate? 	could I be overconcentrating?
could you be overconcentrating?
could he be overconcentrating?
could we be overconcentrating?
could you be overconcentrating?
could they be overconcentrating? 	could I have overconcentrated?
could you have overconcentrated?
could he have overconcentrated?
could we have overconcentrated?
could you have overconcentrated?
could they have overconcentrated? 	could I have been overconcentrating?
could you have been overconcentrating?
could he have been overconcentrating?
could we have been overconcentrating?
could you have been overconcentrating?
could they have been overconcentrating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I overconcentrate?
couldn't you overconcentrate?
couldn't he overconcentrate?
couldn't we overconcentrate?
couldn't you overconcentrate?
couldn't they overconcentrate? 	couldn't I be overconcentrating?
couldn't you be overconcentrating?
couldn't he be overconcentrating?
couldn't we be overconcentrating?
couldn't you be overconcentrating?
couldn't they be overconcentrating? 	couldn't I have overconcentrated?
couldn't you have overconcentrated?
couldn't he have overconcentrated?
couldn't we have overconcentrated?
couldn't you have overconcentrated?
couldn't they have overconcentrated? 	couldn't I have been overconcentrating?
couldn't you have been overconcentrating?
couldn't he have been overconcentrating?
couldn't we have been overconcentrating?
couldn't you have been overconcentrating?
couldn't they have been overconcentrating?