could sundown
Regular verb: sundown - sundowned- sundowned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could sundown
you could sundown
she could sundown
we could sundown
you could sundown
they could sundown 	I could be sundowning
you could be sundowning
she could be sundowning
we could be sundowning
you could be sundowning
they could be sundowning	I could have sundowned
you could have sundowned
she could have sundowned
we could have sundowned
you could have sundowned
they could have sundowned	I could have been sundowning
you could have been sundowning
she could have been sundowning
we could have been sundowning
you could have been sundowning
they could have been sundowning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not sundown
you could not sundown
she could not sundown
we could not sundown
you could not sundown
they could not sundown 	I could not be sundowning
you could not be sundowning
she could not be sundowning
we could not be sundowning
you could not be sundowning
they could not be sundowning	I could not have sundowned
you could not have sundowned
she could not have sundowned
we could not have sundowned
you could not have sundowned
they could not have sundowned	I could not have been sundowning
you could not have been sundowning
she could not have been sundowning
we could not have been sundowning
you could not have been sundowning
they could not have been sundowning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I sundown?
could you sundown?
could she sundown?
could we sundown?
could you sundown?
could they sundown? 	could I be sundowning?
could you be sundowning?
could she be sundowning?
could we be sundowning?
could you be sundowning?
could they be sundowning? 	could I have sundowned?
could you have sundowned?
could she have sundowned?
could we have sundowned?
could you have sundowned?
could they have sundowned? 	could I have been sundowning?
could you have been sundowning?
could she have been sundowning?
could we have been sundowning?
could you have been sundowning?
could they have been sundowning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not sundown?
could you not sundown?
could she not sundown?
could we not sundown?
could you not sundown?
could they not sundown? 	could I not be sundowning?
could you not be sundowning?
could she not be sundowning?
could we not be sundowning?
could you not be sundowning?
could they not be sundowning? 	could I not have sundowned?
could you not have sundowned?
could she not have sundowned?
could we not have sundowned?
could you not have sundowned?
could they not have sundowned? 	could I not have been sundowning?
could you not have been sundowning?
could she not have been sundowning?
could we not have been sundowning?
could you not have been sundowning?
could they not have been sundowning?