I can pass you can pass he can pass we can pass you can pass they can pass
V-ing form
I can be passing you can be passing he can be passing we can be passing you can be passing they can be passing
Perfect
I can have passed you can have passed he can have passed we can have passed you can have passed they can have passed
V-ing perfect
I can have been passing you can have been passing he can have been passing we can have been passing you can have been passing they can have been passing
Negation
Simple form
I cannot pass you cannot pass he cannot pass we cannot pass you cannot pass they cannot pass
V-ing form
I cannot be passing you cannot be passing he cannot be passing we cannot be passing you cannot be passing they cannot be passing
Perfect
I cannot have passed you cannot have passed he cannot have passed we cannot have passed you cannot have passed they cannot have passed
V-ing perfect
I cannot have been passing you cannot have been passing he cannot have been passing we cannot have been passing you cannot have been passing they cannot have been passing
Interrogative form
Simple form
can I pass? can you pass? can he pass? can we pass? can you pass? can they pass?
V-ing form
can I be passing? can you be passing? can he be passing? can we be passing? can you be passing? can they be passing?
Perfect
can I have passed? can you have passed? can he have passed? can we have passed? can you have passed? can they have passed?
V-ing perfect
can I have been passing? can you have been passing? can he have been passing? can we have been passing? can you have been passing? can they have been passing?
Interro-negative form
Simple form
can I not pass? can you not pass? can he not pass? can we not pass? can you not pass? can they not pass?
V-ing form
can I not be passing? can you not be passing? can he not be passing? can we not be passing? can you not be passing? can they not be passing?
Perfect
can I not have passed? can you not have passed? can he not have passed? can we not have passed? can you not have passed? can they not have passed?
V-ing perfect
can I not have been passing? can you not have been passing? can he not have been passing? can we not have been passing? can you not have been passing? can they not have been passing?