should pretreat
Regular verb: pretreat - pretreated- pretreated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd pretreat
you'd pretreat
he'd pretreat
we'd pretreat
you'd pretreat
they'd pretreat 	I'd be pretreating
you'd be pretreating
he'd be pretreating
we'd be pretreating
you'd be pretreating
they'd be pretreating	I should've pretreated
you should've pretreated
he should've pretreated
we should've pretreated
you should've pretreated
they should've pretreated	I should've been pretreating
you should've been pretreating
he should've been pretreating
we should've been pretreating
you should've been pretreating
they should've been pretreating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't pretreat
you shouldn't pretreat
he shouldn't pretreat
we shouldn't pretreat
you shouldn't pretreat
they shouldn't pretreat 	I shouldn't be pretreating
you shouldn't be pretreating
he shouldn't be pretreating
we shouldn't be pretreating
you shouldn't be pretreating
they shouldn't be pretreating	I shouldn't have pretreated
you shouldn't have pretreated
he shouldn't have pretreated
we shouldn't have pretreated
you shouldn't have pretreated
they shouldn't have pretreated	I shouldn't have been pretreating
you shouldn't have been pretreating
he shouldn't have been pretreating
we shouldn't have been pretreating
you shouldn't have been pretreating
they shouldn't have been pretreating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I pretreat?
should you pretreat?
should he pretreat?
should we pretreat?
should you pretreat?
should they pretreat? 	should I be pretreating?
should you be pretreating?
should he be pretreating?
should we be pretreating?
should you be pretreating?
should they be pretreating? 	should I have pretreated?
should you have pretreated?
should he have pretreated?
should we have pretreated?
should you have pretreated?
should they have pretreated? 	should I have been pretreating?
should you have been pretreating?
should he have been pretreating?
should we have been pretreating?
should you have been pretreating?
should they have been pretreating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I pretreat?
shouldn't you pretreat?
shouldn't he pretreat?
shouldn't we pretreat?
shouldn't you pretreat?
shouldn't they pretreat? 	shouldn't I be pretreating?
shouldn't you be pretreating?
shouldn't he be pretreating?
shouldn't we be pretreating?
shouldn't you be pretreating?
shouldn't they be pretreating? 	shouldn't I have pretreated?
shouldn't you have pretreated?
shouldn't he have pretreated?
shouldn't we have pretreated?
shouldn't you have pretreated?
shouldn't they have pretreated? 	shouldn't I have been pretreating?
shouldn't you have been pretreating?
shouldn't he have been pretreating?
shouldn't we have been pretreating?
shouldn't you have been pretreating?
shouldn't they have been pretreating?