English verb conjugation
SHOULD RETESTIFY

Regular verb: retestify - retestified - retestified

Affirmation

Simple form	V-ing form
I'd retestify you'd retestify he'd retestify we'd retestify you'd retestify they'd retestify	I'd be retestifying you'd be retestifying he'd be retestifying we'd be retestifying you'd be retestifying they'd be retestifying
Perfect	V-ing perfect
I should've retestified you should've retestified he should've retestified we should've retestified you should've retestified they should've retestified	I should've been retestifying you should've been retestifying he should've been retestifying we should've been retestifying you should've been retestifying they should've been retestifying

Negation

Simple form	V-ing form
I shouldn't retestify you shouldn't retestify he shouldn't retestify we shouldn't retestify you shouldn't retestify they shouldn't retestify	I shouldn't be retestifying you shouldn't be retestifying he shouldn't be retestifying we shouldn't be retestifying you shouldn't be retestifying they shouldn't be retestifying
Perfect	V-ing perfect
I shouldn't have retestified you shouldn't have retestified he shouldn't have retestified we shouldn't have retestified you shouldn't have retestified they shouldn't have retestified	I shouldn't have been retestifying you shouldn't have been retestifying he shouldn't have been retestifying we shouldn't have been retestifying you shouldn't have been retestifying they shouldn't have been retestifying

Interrogative form

Simple form	V-ing form
should I retestify? should you retestify? should he retestify? should we retestify? should you retestify? should they retestify?	should I be retestifying? should you be retestifying? should he be retestifying? should we be retestifying? should you be retestifying? should they be retestifying?
Perfect	V-ing perfect
should I have retestified? should you have retestified? should he have retestified? should we have retestified? should you have retestified? should they have retestified?	should I have been retestifying? should you have been retestifying? should he have been retestifying? should we have been retestifying? should you have been retestifying? should they have been retestifying?

Interro-negative form

Simple form	V-ing form
shouldn't I retestify? shouldn't you retestify? shouldn't he retestify? shouldn't we retestify? shouldn't you retestify? shouldn't they retestify?	shouldn't I be retestifying? shouldn't you be retestifying? shouldn't he be retestifying? shouldn't we be retestifying? shouldn't you be retestifying? shouldn't they be retestifying?
Perfect	V-ing perfect
shouldn't I have retestified? shouldn't you have retestified? shouldn't he have retestified? shouldn't we have retestified? shouldn't you have retestified? shouldn't they have retestified?	shouldn't I have been retestifying? shouldn't you have been retestifying? shouldn't he have been retestifying? shouldn't we have been retestifying? shouldn't you have been retestifying? shouldn't they have been retestifying?