I can busy you can busy he can busy we can busy you can busy they can busy
V-ing form
I can be busying you can be busying he can be busying we can be busying you can be busying they can be busying
Perfect
I can have busied you can have busied he can have busied we can have busied you can have busied they can have busied
V-ing perfect
I can have been busying you can have been busying he can have been busying we can have been busying you can have been busying they can have been busying
Negation
Simple form
I can't busy you can't busy he can't busy we can't busy you can't busy they can't busy
V-ing form
I can't be busying you can't be busying he can't be busying we can't be busying you can't be busying they can't be busying
Perfect
I can't have busied you can't have busied he can't have busied we can't have busied you can't have busied they can't have busied
V-ing perfect
I can't have been busying you can't have been busying he can't have been busying we can't have been busying you can't have been busying they can't have been busying
Interrogative form
Simple form
can I busy? can you busy? can he busy? can we busy? can you busy? can they busy?
V-ing form
can I be busying? can you be busying? can he be busying? can we be busying? can you be busying? can they be busying?
Perfect
can I have busied? can you have busied? can he have busied? can we have busied? can you have busied? can they have busied?
V-ing perfect
can I have been busying? can you have been busying? can he have been busying? can we have been busying? can you have been busying? can they have been busying?
Interro-negative form
Simple form
can't I busy? can't you busy? can't he busy? can't we busy? can't you busy? can't they busy?
V-ing form
can't I be busying? can't you be busying? can't he be busying? can't we be busying? can't you be busying? can't they be busying?
Perfect
can't I have busied? can't you have busied? can't he have busied? can't we have busied? can't you have busied? can't they have busied?
V-ing perfect
can't I have been busying? can't you have been busying? can't he have been busying? can't we have been busying? can't you have been busying? can't they have been busying?