I'd be retesting you'd be retesting he'd be retesting we'd be retesting you'd be retesting they'd be retesting
Perfect
I should've retested you should've retested he should've retested we should've retested you should've retested they should've retested
V-ing perfect
I should've been retesting you should've been retesting he should've been retesting we should've been retesting you should've been retesting they should've been retesting
Negation
Simple form
I shouldn't retest you shouldn't retest he shouldn't retest we shouldn't retest you shouldn't retest they shouldn't retest
V-ing form
I shouldn't be retesting you shouldn't be retesting he shouldn't be retesting we shouldn't be retesting you shouldn't be retesting they shouldn't be retesting
Perfect
I shouldn't have retested you shouldn't have retested he shouldn't have retested we shouldn't have retested you shouldn't have retested they shouldn't have retested
V-ing perfect
I shouldn't have been retesting you shouldn't have been retesting he shouldn't have been retesting we shouldn't have been retesting you shouldn't have been retesting they shouldn't have been retesting
Interrogative form
Simple form
should I retest? should you retest? should he retest? should we retest? should you retest? should they retest?
V-ing form
should I be retesting? should you be retesting? should he be retesting? should we be retesting? should you be retesting? should they be retesting?
Perfect
should I have retested? should you have retested? should he have retested? should we have retested? should you have retested? should they have retested?
V-ing perfect
should I have been retesting? should you have been retesting? should he have been retesting? should we have been retesting? should you have been retesting? should they have been retesting?
Interro-negative form
Simple form
shouldn't I retest? shouldn't you retest? shouldn't he retest? shouldn't we retest? shouldn't you retest? shouldn't they retest?
V-ing form
shouldn't I be retesting? shouldn't you be retesting? shouldn't he be retesting? shouldn't we be retesting? shouldn't you be retesting? shouldn't they be retesting?
Perfect
shouldn't I have retested? shouldn't you have retested? shouldn't he have retested? shouldn't we have retested? shouldn't you have retested? shouldn't they have retested?
V-ing perfect
shouldn't I have been retesting? shouldn't you have been retesting? shouldn't he have been retesting? shouldn't we have been retesting? shouldn't you have been retesting? shouldn't they have been retesting?