English verb conjugation
COULD PARK

Regular verb: park - parked - parked

Affirmation

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