Attention, ce verbe peut ne pas exister, la conjugaison est donnée à titre d'exemple.
Affirmation
Forme simple
I could go down you could go down he could go down we could go down you could go down they could go down
Forme en V-ing
I could be go downing you could be go downing he could be go downing we could be go downing you could be go downing they could be go downing
Perfect
I could have go downed you could have go downed he could have go downed we could have go downed you could have go downed they could have go downed
Perfect en V-ing
I could have been go downing you could have been go downing he could have been go downing we could have been go downing you could have been go downing they could have been go downing
Négation
Forme simple
I couldn't go down you couldn't go down he couldn't go down we couldn't go down you couldn't go down they couldn't go down
Forme en V-ing
I couldn't be go downing you couldn't be go downing he couldn't be go downing we couldn't be go downing you couldn't be go downing they couldn't be go downing
Perfect
I couldn't have go downed you couldn't have go downed he couldn't have go downed we couldn't have go downed you couldn't have go downed they couldn't have go downed
Perfect en V-ing
I couldn't have been go downing you couldn't have been go downing he couldn't have been go downing we couldn't have been go downing you couldn't have been go downing they couldn't have been go downing
Forme interrogative
Forme simple
could I go down? could you go down? could he go down? could we go down? could you go down? could they go down?
Forme en V-ing
could I be go downing? could you be go downing? could he be go downing? could we be go downing? could you be go downing? could they be go downing?
Perfect
could I have go downed? could you have go downed? could he have go downed? could we have go downed? could you have go downed? could they have go downed?
Perfect en V-ing
could I have been go downing? could you have been go downing? could he have been go downing? could we have been go downing? could you have been go downing? could they have been go downing?
Forme interro-négative
Forme simple
couldn't I go down? couldn't you go down? couldn't he go down? couldn't we go down? couldn't you go down? couldn't they go down?
Forme en V-ing
couldn't I be go downing? couldn't you be go downing? couldn't he be go downing? couldn't we be go downing? couldn't you be go downing? couldn't they be go downing?
Perfect
couldn't I have go downed? couldn't you have go downed? couldn't he have go downed? couldn't we have go downed? couldn't you have go downed? couldn't they have go downed?
Perfect en V-ing
couldn't I have been go downing? couldn't you have been go downing? couldn't he have been go downing? couldn't we have been go downing? couldn't you have been go downing? couldn't they have been go downing?