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