could run
Irregular verb: run - ran- run

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could run
you could run
she could run
we could run
you could run
they could run 	I could be running
you could be running
she could be running
we could be running
you could be running
they could be running	I could have run
you could have run
she could have run
we could have run
you could have run
they could have run	I could have been running
you could have been running
she could have been running
we could have been running
you could have been running
they could have been running	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not run
you could not run
she could not run
we could not run
you could not run
they could not run 	I could not be running
you could not be running
she could not be running
we could not be running
you could not be running
they could not be running	I could not have run
you could not have run
she could not have run
we could not have run
you could not have run
they could not have run	I could not have been running
you could not have been running
she could not have been running
we could not have been running
you could not have been running
they could not have been running	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I run?
could you run?
could she run?
could we run?
could you run?
could they run? 	could I be running?
could you be running?
could she be running?
could we be running?
could you be running?
could they be running? 	could I have run?
could you have run?
could she have run?
could we have run?
could you have run?
could they have run? 	could I have been running?
could you have been running?
could she have been running?
could we have been running?
could you have been running?
could they have been running? 	

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