I can park you can park he can park we can park you can park they can park
V-ing form
I can be parking you can be parking he can be parking we can be parking you can be parking they can be parking
Perfect
I can have parked you can have parked he can have parked we can have parked you can have parked they can have parked
V-ing perfect
I can have been parking you can have been parking he can have been parking we can have been parking you can have been parking they can have been parking
Negation
Simple form
I cannot park you cannot park he cannot park we cannot park you cannot park they cannot park
V-ing form
I cannot be parking you cannot be parking he cannot be parking we cannot be parking you cannot be parking they cannot be parking
Perfect
I cannot have parked you cannot have parked he cannot have parked we cannot have parked you cannot have parked they cannot have parked
V-ing perfect
I cannot have been parking you cannot have been parking he cannot have been parking we cannot have been parking you cannot have been parking they cannot have been parking
Interrogative form
Simple form
can I park? can you park? can he park? can we park? can you park? can they park?
V-ing form
can I be parking? can you be parking? can he be parking? can we be parking? can you be parking? can they be parking?
Perfect
can I have parked? can you have parked? can he have parked? can we have parked? can you have parked? can they have parked?
V-ing perfect
can I have been parking? can you have been parking? can he have been parking? can we have been parking? can you have been parking? can they have been parking?
Interro-negative form
Simple form
can I not park? can you not park? can he not park? can we not park? can you not park? can they not park?
V-ing form
can I not be parking? can you not be parking? can he not be parking? can we not be parking? can you not be parking? can they not be parking?
Perfect
can I not have parked? can you not have parked? can he not have parked? can we not have parked? can you not have parked? can they not have parked?
V-ing perfect
can I not have been parking? can you not have been parking? can he not have been parking? can we not have been parking? can you not have been parking? can they not have been parking?