should preoccupy
Regular verb: preoccupy - preoccupied- preoccupied

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd preoccupy
you'd preoccupy
she'd preoccupy
we'd preoccupy
you'd preoccupy
they'd preoccupy 	I'd be preoccupying
you'd be preoccupying
she'd be preoccupying
we'd be preoccupying
you'd be preoccupying
they'd be preoccupying	I should've preoccupied
you should've preoccupied
she 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
she 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
she 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
she 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
she 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
she 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 she preoccupy?
should we preoccupy?
should you preoccupy?
should they preoccupy? 	should I be preoccupying?
should you be preoccupying?
should she be preoccupying?
should we be preoccupying?
should you be preoccupying?
should they be preoccupying? 	should I have preoccupied?
should you have preoccupied?
should she 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 she 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 she 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 she 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 she 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 she have been preoccupying?
shouldn't we have been preoccupying?
shouldn't you have been preoccupying?
shouldn't they have been preoccupying?