should deepen
Regular verb: deepen - deepened- deepened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd deepen
you'd deepen
she'd deepen
we'd deepen
you'd deepen
they'd deepen 	I'd be deepening
you'd be deepening
she'd be deepening
we'd be deepening
you'd be deepening
they'd be deepening	I should've deepened
you should've deepened
she 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
she 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
she 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
she 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
she 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
she 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 she deepen?
should we deepen?
should you deepen?
should they deepen? 	should I be deepening?
should you be deepening?
should she be deepening?
should we be deepening?
should you be deepening?
should they be deepening? 	should I have deepened?
should you have deepened?
should she 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 she 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 she 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 she 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 she 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 she have been deepening?
shouldn't we have been deepening?
shouldn't you have been deepening?
shouldn't they have been deepening?