I can approve you can approve she can approve we can approve you can approve they can approve
V-ing form
I can be approving you can be approving she can be approving we can be approving you can be approving they can be approving
Perfect
I can have approved you can have approved she can have approved we can have approved you can have approved they can have approved
V-ing perfect
I can have been approving you can have been approving she can have been approving we can have been approving you can have been approving they can have been approving
Negation
Simple form
I cannot approve you cannot approve she cannot approve we cannot approve you cannot approve they cannot approve
V-ing form
I cannot be approving you cannot be approving she cannot be approving we cannot be approving you cannot be approving they cannot be approving
Perfect
I cannot have approved you cannot have approved she cannot have approved we cannot have approved you cannot have approved they cannot have approved
V-ing perfect
I cannot have been approving you cannot have been approving she cannot have been approving we cannot have been approving you cannot have been approving they cannot have been approving
Interrogative form
Simple form
can I approve? can you approve? can she approve? can we approve? can you approve? can they approve?
V-ing form
can I be approving? can you be approving? can she be approving? can we be approving? can you be approving? can they be approving?
Perfect
can I have approved? can you have approved? can she have approved? can we have approved? can you have approved? can they have approved?
V-ing perfect
can I have been approving? can you have been approving? can she have been approving? can we have been approving? can you have been approving? can they have been approving?
Interro-negative form
Simple form
can I not approve? can you not approve? can she not approve? can we not approve? can you not approve? can they not approve?
V-ing form
can I not be approving? can you not be approving? can she not be approving? can we not be approving? can you not be approving? can they not be approving?
Perfect
can I not have approved? can you not have approved? can she not have approved? can we not have approved? can you not have approved? can they not have approved?
V-ing perfect
can I not have been approving? can you not have been approving? can she not have been approving? can we not have been approving? can you not have been approving? can they not have been approving?