I should study you should study she should study we should study you should study they should study
V-ing form
I should be studying you should be studying she should be studying we should be studying you should be studying they should be studying
Perfect
I should have studied you should have studied she should have studied we should have studied you should have studied they should have studied
V-ing perfect
I should have been studying you should have been studying she should have been studying we should have been studying you should have been studying they should have been studying
Negation
Simple form
I should not study you should not study she should not study we should not study you should not study they should not study
V-ing form
I should not be studying you should not be studying she should not be studying we should not be studying you should not be studying they should not be studying
Perfect
I should not have studied you should not have studied she should not have studied we should not have studied you should not have studied they should not have studied
V-ing perfect
I should not have been studying you should not have been studying she should not have been studying we should not have been studying you should not have been studying they should not have been studying
Interrogative form
Simple form
should I study? should you study? should she study? should we study? should you study? should they study?
V-ing form
should I be studying? should you be studying? should she be studying? should we be studying? should you be studying? should they be studying?
Perfect
should I have studied? should you have studied? should she have studied? should we have studied? should you have studied? should they have studied?
V-ing perfect
should I have been studying? should you have been studying? should she have been studying? should we have been studying? should you have been studying? should they have been studying?
Interro-negative form
Simple form
should I not study? should you not study? should she not study? should we not study? should you not study? should they not study?
V-ing form
should I not be studying? should you not be studying? should she not be studying? should we not be studying? should you not be studying? should they not be studying?
Perfect
should I not have studied? should you not have studied? should she not have studied? should we not have studied? should you not have studied? should they not have studied?
V-ing perfect
should I not have been studying? should you not have been studying? should she not have been studying? should we not have been studying? should you not have been studying? should they not have been studying?