Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I can add add you can add add he can add add we can add add you can add add they can add add
V-ing form
I can be add adding you can be add adding he can be add adding we can be add adding you can be add adding they can be add adding
Perfect
I can have add added you can have add added he can have add added we can have add added you can have add added they can have add added
V-ing perfect
I can have been add adding you can have been add adding he can have been add adding we can have been add adding you can have been add adding they can have been add adding
Negation
Simple form
I cannot add add you cannot add add he cannot add add we cannot add add you cannot add add they cannot add add
V-ing form
I cannot be add adding you cannot be add adding he cannot be add adding we cannot be add adding you cannot be add adding they cannot be add adding
Perfect
I cannot have add added you cannot have add added he cannot have add added we cannot have add added you cannot have add added they cannot have add added
V-ing perfect
I cannot have been add adding you cannot have been add adding he cannot have been add adding we cannot have been add adding you cannot have been add adding they cannot have been add adding
Interrogative form
Simple form
can I add add? can you add add? can he add add? can we add add? can you add add? can they add add?
V-ing form
can I be add adding? can you be add adding? can he be add adding? can we be add adding? can you be add adding? can they be add adding?
Perfect
can I have add added? can you have add added? can he have add added? can we have add added? can you have add added? can they have add added?
V-ing perfect
can I have been add adding? can you have been add adding? can he have been add adding? can we have been add adding? can you have been add adding? can they have been add adding?
Interro-negative form
Simple form
can I not add add? can you not add add? can he not add add? can we not add add? can you not add add? can they not add add?
V-ing form
can I not be add adding? can you not be add adding? can he not be add adding? can we not be add adding? can you not be add adding? can they not be add adding?
Perfect
can I not have add added? can you not have add added? can he not have add added? can we not have add added? can you not have add added? can they not have add added?
V-ing perfect
can I not have been add adding? can you not have been add adding? can he not have been add adding? can we not have been add adding? can you not have been add adding? can they not have been add adding?