could park
Regular verb: park - parked- parked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could park
you could park
she could park
we could park
you could park
they could park 	I could be parking
you could be parking
she could be parking
we could be parking
you could be parking
they could be parking	I could have parked
you could have parked
she could have parked
we could have parked
you could have parked
they could have parked	I could have been parking
you could have been parking
she could have been parking
we could have been parking
you could have been parking
they could have been parking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not park
you could not park
she could not park
we could not park
you could not park
they could not park 	I could not be parking
you could not be parking
she could not be parking
we could not be parking
you could not be parking
they could not be parking	I could not have parked
you could not have parked
she could not have parked
we could not have parked
you could not have parked
they could not have parked	I could not have been parking
you could not have been parking
she could not have been parking
we could not have been parking
you could not have been parking
they could not have been parking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I park?
could you park?
could she park?
could we park?
could you park?
could they park? 	could I be parking?
could you be parking?
could she be parking?
could we be parking?
could you be parking?
could they be parking? 	could I have parked?
could you have parked?
could she have parked?
could we have parked?
could you have parked?
could they have parked? 	could I have been parking?
could you have been parking?
could she have been parking?
could we have been parking?
could you have been parking?
could they have been parking? 	

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