should deepen
Regular verb: deepen - deepened- deepened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd deepen
you'd deepen
he'd deepen
we'd deepen
you'd deepen
they'd deepen 	I'd be deepening
you'd be deepening
he'd be deepening
we'd be deepening
you'd be deepening
they'd be deepening	I should've deepened
you should've deepened
he should've deepened
we should've deepened
you should've deepened
they should've deepened	I should've been deepening
you should've been deepening
he should've been deepening
we should've been deepening
you should've been deepening
they should've been deepening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't deepen
you shouldn't deepen
he shouldn't deepen
we shouldn't deepen
you shouldn't deepen
they shouldn't deepen 	I shouldn't be deepening
you shouldn't be deepening
he shouldn't be deepening
we shouldn't be deepening
you shouldn't be deepening
they shouldn't be deepening	I shouldn't have deepened
you shouldn't have deepened
he shouldn't have deepened
we shouldn't have deepened
you shouldn't have deepened
they shouldn't have deepened	I shouldn't have been deepening
you shouldn't have been deepening
he shouldn't have been deepening
we shouldn't have been deepening
you shouldn't have been deepening
they shouldn't have been deepening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I deepen?
should you deepen?
should he deepen?
should we deepen?
should you deepen?
should they deepen? 	should I be deepening?
should you be deepening?
should he be deepening?
should we be deepening?
should you be deepening?
should they be deepening? 	should I have deepened?
should you have deepened?
should he have deepened?
should we have deepened?
should you have deepened?
should they have deepened? 	should I have been deepening?
should you have been deepening?
should he have been deepening?
should we have been deepening?
should you have been deepening?
should they have been deepening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I deepen?
shouldn't you deepen?
shouldn't he deepen?
shouldn't we deepen?
shouldn't you deepen?
shouldn't they deepen? 	shouldn't I be deepening?
shouldn't you be deepening?
shouldn't he be deepening?
shouldn't we be deepening?
shouldn't you be deepening?
shouldn't they be deepening? 	shouldn't I have deepened?
shouldn't you have deepened?
shouldn't he have deepened?
shouldn't we have deepened?
shouldn't you have deepened?
shouldn't they have deepened? 	shouldn't I have been deepening?
shouldn't you have been deepening?
shouldn't he have been deepening?
shouldn't we have been deepening?
shouldn't you have been deepening?
shouldn't they have been deepening?