I should design you should design he should design we should design you should design they should design
V-ing form
I should be designing you should be designing he should be designing we should be designing you should be designing they should be designing
Perfect
I should have designed you should have designed he should have designed we should have designed you should have designed they should have designed
V-ing perfect
I should have been designing you should have been designing he should have been designing we should have been designing you should have been designing they should have been designing
Negation
Simple form
I should not design you should not design he should not design we should not design you should not design they should not design
V-ing form
I should not be designing you should not be designing he should not be designing we should not be designing you should not be designing they should not be designing
Perfect
I should not have designed you should not have designed he should not have designed we should not have designed you should not have designed they should not have designed
V-ing perfect
I should not have been designing you should not have been designing he should not have been designing we should not have been designing you should not have been designing they should not have been designing
Interrogative form
Simple form
should I design? should you design? should he design? should we design? should you design? should they design?
V-ing form
should I be designing? should you be designing? should he be designing? should we be designing? should you be designing? should they be designing?
Perfect
should I have designed? should you have designed? should he have designed? should we have designed? should you have designed? should they have designed?
V-ing perfect
should I have been designing? should you have been designing? should he have been designing? should we have been designing? should you have been designing? should they have been designing?
Interro-negative form
Simple form
should I not design? should you not design? should he not design? should we not design? should you not design? should they not design?
V-ing form
should I not be designing? should you not be designing? should he not be designing? should we not be designing? should you not be designing? should they not be designing?
Perfect
should I not have designed? should you not have designed? should he not have designed? should we not have designed? should you not have designed? should they not have designed?
V-ing perfect
should I not have been designing? should you not have been designing? should he not have been designing? should we not have been designing? should you not have been designing? should they not have been designing?