I can aid you can aid she can aid we can aid you can aid they can aid
V-ing form
I can be aiding you can be aiding she can be aiding we can be aiding you can be aiding they can be aiding
Perfect
I can have aided you can have aided she can have aided we can have aided you can have aided they can have aided
V-ing perfect
I can have been aiding you can have been aiding she can have been aiding we can have been aiding you can have been aiding they can have been aiding
Negation
Simple form
I cannot aid you cannot aid she cannot aid we cannot aid you cannot aid they cannot aid
V-ing form
I cannot be aiding you cannot be aiding she cannot be aiding we cannot be aiding you cannot be aiding they cannot be aiding
Perfect
I cannot have aided you cannot have aided she cannot have aided we cannot have aided you cannot have aided they cannot have aided
V-ing perfect
I cannot have been aiding you cannot have been aiding she cannot have been aiding we cannot have been aiding you cannot have been aiding they cannot have been aiding
Interrogative form
Simple form
can I aid? can you aid? can she aid? can we aid? can you aid? can they aid?
V-ing form
can I be aiding? can you be aiding? can she be aiding? can we be aiding? can you be aiding? can they be aiding?
Perfect
can I have aided? can you have aided? can she have aided? can we have aided? can you have aided? can they have aided?
V-ing perfect
can I have been aiding? can you have been aiding? can she have been aiding? can we have been aiding? can you have been aiding? can they have been aiding?
Interro-negative form
Simple form
can I not aid? can you not aid? can she not aid? can we not aid? can you not aid? can they not aid?
V-ing form
can I not be aiding? can you not be aiding? can she not be aiding? can we not be aiding? can you not be aiding? can they not be aiding?
Perfect
can I not have aided? can you not have aided? can she not have aided? can we not have aided? can you not have aided? can they not have aided?
V-ing perfect
can I not have been aiding? can you not have been aiding? can she not have been aiding? can we not have been aiding? can you not have been aiding? can they not have been aiding?