should level
Regular verb: level - levelled- levelled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd level
you'd level
he'd level
we'd level
you'd level
they'd level 	I'd be levelling
you'd be levelling
he'd be levelling
we'd be levelling
you'd be levelling
they'd be levelling	I should've levelled
you should've levelled
he should've levelled
we should've levelled
you should've levelled
they should've levelled	I should've been levelling
you should've been levelling
he should've been levelling
we should've been levelling
you should've been levelling
they should've been levelling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't level
you shouldn't level
he shouldn't level
we shouldn't level
you shouldn't level
they shouldn't level 	I shouldn't be levelling
you shouldn't be levelling
he shouldn't be levelling
we shouldn't be levelling
you shouldn't be levelling
they shouldn't be levelling	I shouldn't have levelled
you shouldn't have levelled
he shouldn't have levelled
we shouldn't have levelled
you shouldn't have levelled
they shouldn't have levelled	I shouldn't have been levelling
you shouldn't have been levelling
he shouldn't have been levelling
we shouldn't have been levelling
you shouldn't have been levelling
they shouldn't have been levelling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I level?
should you level?
should he level?
should we level?
should you level?
should they level? 	should I be levelling?
should you be levelling?
should he be levelling?
should we be levelling?
should you be levelling?
should they be levelling? 	should I have levelled?
should you have levelled?
should he have levelled?
should we have levelled?
should you have levelled?
should they have levelled? 	should I have been levelling?
should you have been levelling?
should he have been levelling?
should we have been levelling?
should you have been levelling?
should they have been levelling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I level?
shouldn't you level?
shouldn't he level?
shouldn't we level?
shouldn't you level?
shouldn't they level? 	shouldn't I be levelling?
shouldn't you be levelling?
shouldn't he be levelling?
shouldn't we be levelling?
shouldn't you be levelling?
shouldn't they be levelling? 	shouldn't I have levelled?
shouldn't you have levelled?
shouldn't he have levelled?
shouldn't we have levelled?
shouldn't you have levelled?
shouldn't they have levelled? 	shouldn't I have been levelling?
shouldn't you have been levelling?
shouldn't he have been levelling?
shouldn't we have been levelling?
shouldn't you have been levelling?
shouldn't they have been levelling?