I can preoccupy you can preoccupy he can preoccupy we can preoccupy you can preoccupy they can preoccupy
V-ing form
I can be preoccupying you can be preoccupying he can be preoccupying we can be preoccupying you can be preoccupying they can be preoccupying
Perfect
I can have preoccupied you can have preoccupied he can have preoccupied we can have preoccupied you can have preoccupied they can have preoccupied
V-ing perfect
I can have been preoccupying you can have been preoccupying he can have been preoccupying we can have been preoccupying you can have been preoccupying they can have been preoccupying
Negation
Simple form
I can't preoccupy you can't preoccupy he can't preoccupy we can't preoccupy you can't preoccupy they can't preoccupy
V-ing form
I can't be preoccupying you can't be preoccupying he can't be preoccupying we can't be preoccupying you can't be preoccupying they can't be preoccupying
Perfect
I can't have preoccupied you can't have preoccupied he can't have preoccupied we can't have preoccupied you can't have preoccupied they can't have preoccupied
V-ing perfect
I can't have been preoccupying you can't have been preoccupying he can't have been preoccupying we can't have been preoccupying you can't have been preoccupying they can't have been preoccupying
Interrogative form
Simple form
can I preoccupy? can you preoccupy? can he preoccupy? can we preoccupy? can you preoccupy? can they preoccupy?
V-ing form
can I be preoccupying? can you be preoccupying? can he be preoccupying? can we be preoccupying? can you be preoccupying? can they be preoccupying?
Perfect
can I have preoccupied? can you have preoccupied? can he have preoccupied? can we have preoccupied? can you have preoccupied? can they have preoccupied?
V-ing perfect
can I have been preoccupying? can you have been preoccupying? can he have been preoccupying? can we have been preoccupying? can you have been preoccupying? can they have been preoccupying?
Interro-negative form
Simple form
can't I preoccupy? can't you preoccupy? can't he preoccupy? can't we preoccupy? can't you preoccupy? can't they preoccupy?
V-ing form
can't I be preoccupying? can't you be preoccupying? can't he be preoccupying? can't we be preoccupying? can't you be preoccupying? can't they be preoccupying?
Perfect
can't I have preoccupied? can't you have preoccupied? can't he have preoccupied? can't we have preoccupied? can't you have preoccupied? can't they have preoccupied?
V-ing perfect
can't I have been preoccupying? can't you have been preoccupying? can't he have been preoccupying? can't we have been preoccupying? can't you have been preoccupying? can't they have been preoccupying?