could preoccupy
Regular verb: preoccupy - preoccupied- preoccupied

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could preoccupy
you could preoccupy
he could preoccupy
we could preoccupy
you could preoccupy
they could preoccupy 	I could be preoccupying
you could be preoccupying
he could be preoccupying
we could be preoccupying
you could be preoccupying
they could be preoccupying	I could have preoccupied
you could have preoccupied
he could have preoccupied
we could have preoccupied
you could have preoccupied
they could have preoccupied	I could have been preoccupying
you could have been preoccupying
he could have been preoccupying
we could have been preoccupying
you could have been preoccupying
they could have been preoccupying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't preoccupy
you couldn't preoccupy
he couldn't preoccupy
we couldn't preoccupy
you couldn't preoccupy
they couldn't preoccupy 	I couldn't be preoccupying
you couldn't be preoccupying
he couldn't be preoccupying
we couldn't be preoccupying
you couldn't be preoccupying
they couldn't be preoccupying	I couldn't have preoccupied
you couldn't have preoccupied
he couldn't have preoccupied
we couldn't have preoccupied
you couldn't have preoccupied
they couldn't have preoccupied	I couldn't have been preoccupying
you couldn't have been preoccupying
he couldn't have been preoccupying
we couldn't have been preoccupying
you couldn't have been preoccupying
they couldn't have been preoccupying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I preoccupy?
could you preoccupy?
could he preoccupy?
could we preoccupy?
could you preoccupy?
could they preoccupy? 	could I be preoccupying?
could you be preoccupying?
could he be preoccupying?
could we be preoccupying?
could you be preoccupying?
could they be preoccupying? 	could I have preoccupied?
could you have preoccupied?
could he have preoccupied?
could we have preoccupied?
could you have preoccupied?
could they have preoccupied? 	could I have been preoccupying?
could you have been preoccupying?
could he have been preoccupying?
could we have been preoccupying?
could you have been preoccupying?
could they have been preoccupying? 	

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