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 couldn't park you couldn't park he couldn't park we couldn't park you couldn't park they couldn't park	I couldn't be parking you couldn't be parking he couldn't be parking we couldn't be parking you couldn't be parking they couldn't be parking
Perfect	V-ing perfect
I couldn't have parked you couldn't have parked he couldn't have parked we couldn't have parked you couldn't have parked they couldn't have parked	I couldn't have been parking you couldn't have been parking he couldn't have been parking we couldn't have been parking you couldn't have been parking they couldn't 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
couldn't I park? couldn't you park? couldn't he park? couldn't we park? couldn't you park? couldn't they park?	couldn't I be parking? couldn't you be parking? couldn't he be parking? couldn't we be parking? couldn't you be parking? couldn't they be parking?
Perfect	V-ing perfect
couldn't I have parked? couldn't you have parked? couldn't he have parked? couldn't we have parked? couldn't you have parked? couldn't they have parked?	couldn't I have been parking? couldn't you have been parking? couldn't he have been parking? couldn't we have been parking? couldn't you have been parking? couldn't they have been parking?