could cow
Regular verb: cow - cowed- cowed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could cow
you could cow
she could cow
we could cow
you could cow
they could cow 	I could be cowing
you could be cowing
she could be cowing
we could be cowing
you could be cowing
they could be cowing	I could have cowed
you could have cowed
she could have cowed
we could have cowed
you could have cowed
they could have cowed	I could have been cowing
you could have been cowing
she could have been cowing
we could have been cowing
you could have been cowing
they could have been cowing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not cow
you could not cow
she could not cow
we could not cow
you could not cow
they could not cow 	I could not be cowing
you could not be cowing
she could not be cowing
we could not be cowing
you could not be cowing
they could not be cowing	I could not have cowed
you could not have cowed
she could not have cowed
we could not have cowed
you could not have cowed
they could not have cowed	I could not have been cowing
you could not have been cowing
she could not have been cowing
we could not have been cowing
you could not have been cowing
they could not have been cowing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I cow?
could you cow?
could she cow?
could we cow?
could you cow?
could they cow? 	could I be cowing?
could you be cowing?
could she be cowing?
could we be cowing?
could you be cowing?
could they be cowing? 	could I have cowed?
could you have cowed?
could she have cowed?
could we have cowed?
could you have cowed?
could they have cowed? 	could I have been cowing?
could you have been cowing?
could she have been cowing?
could we have been cowing?
could you have been cowing?
could they have been cowing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not cow?
could you not cow?
could she not cow?
could we not cow?
could you not cow?
could they not cow? 	could I not be cowing?
could you not be cowing?
could she not be cowing?
could we not be cowing?
could you not be cowing?
could they not be cowing? 	could I not have cowed?
could you not have cowed?
could she not have cowed?
could we not have cowed?
could you not have cowed?
could they not have cowed? 	could I not have been cowing?
could you not have been cowing?
could she not have been cowing?
could we not have been cowing?
could you not have been cowing?
could they not have been cowing?