Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could shout shout you could shout shout he could shout shout we could shout shout you could shout shout they could shout shout
V-ing form
I could be shout shouting you could be shout shouting he could be shout shouting we could be shout shouting you could be shout shouting they could be shout shouting
Perfect
I could have shout shouted you could have shout shouted he could have shout shouted we could have shout shouted you could have shout shouted they could have shout shouted
V-ing perfect
I could have been shout shouting you could have been shout shouting he could have been shout shouting we could have been shout shouting you could have been shout shouting they could have been shout shouting
Negation
Simple form
I couldn't shout shout you couldn't shout shout he couldn't shout shout we couldn't shout shout you couldn't shout shout they couldn't shout shout
V-ing form
I couldn't be shout shouting you couldn't be shout shouting he couldn't be shout shouting we couldn't be shout shouting you couldn't be shout shouting they couldn't be shout shouting
Perfect
I couldn't have shout shouted you couldn't have shout shouted he couldn't have shout shouted we couldn't have shout shouted you couldn't have shout shouted they couldn't have shout shouted
V-ing perfect
I couldn't have been shout shouting you couldn't have been shout shouting he couldn't have been shout shouting we couldn't have been shout shouting you couldn't have been shout shouting they couldn't have been shout shouting
Interrogative form
Simple form
could I shout shout? could you shout shout? could he shout shout? could we shout shout? could you shout shout? could they shout shout?
V-ing form
could I be shout shouting? could you be shout shouting? could he be shout shouting? could we be shout shouting? could you be shout shouting? could they be shout shouting?
Perfect
could I have shout shouted? could you have shout shouted? could he have shout shouted? could we have shout shouted? could you have shout shouted? could they have shout shouted?
V-ing perfect
could I have been shout shouting? could you have been shout shouting? could he have been shout shouting? could we have been shout shouting? could you have been shout shouting? could they have been shout shouting?
Interro-negative form
Simple form
couldn't I shout shout? couldn't you shout shout? couldn't he shout shout? couldn't we shout shout? couldn't you shout shout? couldn't they shout shout?
V-ing form
couldn't I be shout shouting? couldn't you be shout shouting? couldn't he be shout shouting? couldn't we be shout shouting? couldn't you be shout shouting? couldn't they be shout shouting?
Perfect
couldn't I have shout shouted? couldn't you have shout shouted? couldn't he have shout shouted? couldn't we have shout shouted? couldn't you have shout shouted? couldn't they have shout shouted?
V-ing perfect
couldn't I have been shout shouting? couldn't you have been shout shouting? couldn't he have been shout shouting? couldn't we have been shout shouting? couldn't you have been shout shouting? couldn't they have been shout shouting?