could dog-ear
Regular verb: dog-ear - dog-eared- dog-eared

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could dog-ear
you could dog-ear
she could dog-ear
we could dog-ear
you could dog-ear
they could dog-ear 	I could be dog-earing
you could be dog-earing
she could be dog-earing
we could be dog-earing
you could be dog-earing
they could be dog-earing	I could have dog-eared
you could have dog-eared
she could have dog-eared
we could have dog-eared
you could have dog-eared
they could have dog-eared	I could have been dog-earing
you could have been dog-earing
she could have been dog-earing
we could have been dog-earing
you could have been dog-earing
they could have been dog-earing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not dog-ear
you could not dog-ear
she could not dog-ear
we could not dog-ear
you could not dog-ear
they could not dog-ear 	I could not be dog-earing
you could not be dog-earing
she could not be dog-earing
we could not be dog-earing
you could not be dog-earing
they could not be dog-earing	I could not have dog-eared
you could not have dog-eared
she could not have dog-eared
we could not have dog-eared
you could not have dog-eared
they could not have dog-eared	I could not have been dog-earing
you could not have been dog-earing
she could not have been dog-earing
we could not have been dog-earing
you could not have been dog-earing
they could not have been dog-earing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I dog-ear?
could you dog-ear?
could she dog-ear?
could we dog-ear?
could you dog-ear?
could they dog-ear? 	could I be dog-earing?
could you be dog-earing?
could she be dog-earing?
could we be dog-earing?
could you be dog-earing?
could they be dog-earing? 	could I have dog-eared?
could you have dog-eared?
could she have dog-eared?
could we have dog-eared?
could you have dog-eared?
could they have dog-eared? 	could I have been dog-earing?
could you have been dog-earing?
could she have been dog-earing?
could we have been dog-earing?
could you have been dog-earing?
could they have been dog-earing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not dog-ear?
could you not dog-ear?
could she not dog-ear?
could we not dog-ear?
could you not dog-ear?
could they not dog-ear? 	could I not be dog-earing?
could you not be dog-earing?
could she not be dog-earing?
could we not be dog-earing?
could you not be dog-earing?
could they not be dog-earing? 	could I not have dog-eared?
could you not have dog-eared?
could she not have dog-eared?
could we not have dog-eared?
could you not have dog-eared?
could they not have dog-eared? 	could I not have been dog-earing?
could you not have been dog-earing?
could she not have been dog-earing?
could we not have been dog-earing?
could you not have been dog-earing?
could they not have been dog-earing?