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