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 could not preoccupy
you could not preoccupy
he could not preoccupy
we could not preoccupy
you could not preoccupy
they could not preoccupy 	I could not be preoccupying
you could not be preoccupying
he could not be preoccupying
we could not be preoccupying
you could not be preoccupying
they could not be preoccupying	I could not have preoccupied
you could not have preoccupied
he could not have preoccupied
we could not have preoccupied
you could not have preoccupied
they could not have preoccupied	I could not have been preoccupying
you could not have been preoccupying
he could not have been preoccupying
we could not have been preoccupying
you could not have been preoccupying
they could not 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 	
could I not preoccupy?
could you not preoccupy?
could he not preoccupy?
could we not preoccupy?
could you not preoccupy?
could they not preoccupy? 	could I not be preoccupying?
could you not be preoccupying?
could he not be preoccupying?
could we not be preoccupying?
could you not be preoccupying?
could they not be preoccupying? 	could I not have preoccupied?
could you not have preoccupied?
could he not have preoccupied?
could we not have preoccupied?
could you not have preoccupied?
could they not have preoccupied? 	could I not have been preoccupying?
could you not have been preoccupying?
could he not have been preoccupying?
could we not have been preoccupying?
could you not have been preoccupying?
could they not have been preoccupying?