I should regret you should regret she should regret we should regret you should regret they should regret
V-ing form
I should be regreting you should be regreting she should be regreting we should be regreting you should be regreting they should be regreting
Perfect
I should have regreted you should have regreted she should have regreted we should have regreted you should have regreted they should have regreted
V-ing perfect
I should have been regreting you should have been regreting she should have been regreting we should have been regreting you should have been regreting they should have been regreting
Negation
Simple form
I should not regret you should not regret she should not regret we should not regret you should not regret they should not regret
V-ing form
I should not be regreting you should not be regreting she should not be regreting we should not be regreting you should not be regreting they should not be regreting
Perfect
I should not have regreted you should not have regreted she should not have regreted we should not have regreted you should not have regreted they should not have regreted
V-ing perfect
I should not have been regreting you should not have been regreting she should not have been regreting we should not have been regreting you should not have been regreting they should not have been regreting
Interrogative form
Simple form
should I regret? should you regret? should she regret? should we regret? should you regret? should they regret?
V-ing form
should I be regreting? should you be regreting? should she be regreting? should we be regreting? should you be regreting? should they be regreting?
Perfect
should I have regreted? should you have regreted? should she have regreted? should we have regreted? should you have regreted? should they have regreted?
V-ing perfect
should I have been regreting? should you have been regreting? should she have been regreting? should we have been regreting? should you have been regreting? should they have been regreting?
Interro-negative form
Simple form
should I not regret? should you not regret? should she not regret? should we not regret? should you not regret? should they not regret?
V-ing form
should I not be regreting? should you not be regreting? should she not be regreting? should we not be regreting? should you not be regreting? should they not be regreting?
Perfect
should I not have regreted? should you not have regreted? should she not have regreted? should we not have regreted? should you not have regreted? should they not have regreted?
V-ing perfect
should I not have been regreting? should you not have been regreting? should she not have been regreting? should we not have been regreting? should you not have been regreting? should they not have been regreting?