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