could blink
Regular verb: blink - blinked- blinked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could blink
you could blink
she could blink
we could blink
you could blink
they could blink 	I could be blinking
you could be blinking
she could be blinking
we could be blinking
you could be blinking
they could be blinking	I could have blinked
you could have blinked
she could have blinked
we could have blinked
you could have blinked
they could have blinked	I could have been blinking
you could have been blinking
she could have been blinking
we could have been blinking
you could have been blinking
they could have been blinking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not blink
you could not blink
she could not blink
we could not blink
you could not blink
they could not blink 	I could not be blinking
you could not be blinking
she could not be blinking
we could not be blinking
you could not be blinking
they could not be blinking	I could not have blinked
you could not have blinked
she could not have blinked
we could not have blinked
you could not have blinked
they could not have blinked	I could not have been blinking
you could not have been blinking
she could not have been blinking
we could not have been blinking
you could not have been blinking
they could not have been blinking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I blink?
could you blink?
could she blink?
could we blink?
could you blink?
could they blink? 	could I be blinking?
could you be blinking?
could she be blinking?
could we be blinking?
could you be blinking?
could they be blinking? 	could I have blinked?
could you have blinked?
could she have blinked?
could we have blinked?
could you have blinked?
could they have blinked? 	could I have been blinking?
could you have been blinking?
could she have been blinking?
could we have been blinking?
could you have been blinking?
could they have been blinking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not blink?
could you not blink?
could she not blink?
could we not blink?
could you not blink?
could they not blink? 	could I not be blinking?
could you not be blinking?
could she not be blinking?
could we not be blinking?
could you not be blinking?
could they not be blinking? 	could I not have blinked?
could you not have blinked?
could she not have blinked?
could we not have blinked?
could you not have blinked?
could they not have blinked? 	could I not have been blinking?
could you not have been blinking?
could she not have been blinking?
could we not have been blinking?
could you not have been blinking?
could they not have been blinking?