should preoccupy
Regular verb: preoccupy - preoccupied- preoccupied

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd preoccupy
you'd preoccupy
he'd preoccupy
we'd preoccupy
you'd preoccupy
they'd preoccupy 	I'd be preoccupying
you'd be preoccupying
he'd be preoccupying
we'd be preoccupying
you'd be preoccupying
they'd be preoccupying	I should've preoccupied
you should've preoccupied
he should've preoccupied
we should've preoccupied
you should've preoccupied
they should've preoccupied	I should've been preoccupying
you should've been preoccupying
he should've been preoccupying
we should've been preoccupying
you should've been preoccupying
they should've been preoccupying	

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

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

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