could preoccupy
Regular verb: preoccupy - preoccupied- preoccupied

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could preoccupy
you could preoccupy
she could preoccupy
we could preoccupy
you could preoccupy
they could preoccupy 	I could be preoccupying
you could be preoccupying
she could be preoccupying
we could be preoccupying
you could be preoccupying
they could be preoccupying	I could have preoccupied
you could have preoccupied
she 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
she 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
she 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
she 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
she 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
she 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 she preoccupy?
could we preoccupy?
could you preoccupy?
could they preoccupy? 	could I be preoccupying?
could you be preoccupying?
could she be preoccupying?
could we be preoccupying?
could you be preoccupying?
could they be preoccupying? 	could I have preoccupied?
could you have preoccupied?
could she 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 she 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 she 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 she 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 she 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 she have been preoccupying?
couldn't we have been preoccupying?
couldn't you have been preoccupying?
couldn't they have been preoccupying?