I'd study you'd study she'd study we'd study you'd study they'd study
V-ing form
I'd be studying you'd be studying she'd be studying we'd be studying you'd be studying they'd be studying
Perfect
I should've studied you should've studied she should've studied we should've studied you should've studied they should've studied
V-ing perfect
I should've been studying you should've been studying she should've been studying we should've been studying you should've been studying they should've been studying
Negation
Simple form
I shouldn't study you shouldn't study she shouldn't study we shouldn't study you shouldn't study they shouldn't study
V-ing form
I shouldn't be studying you shouldn't be studying she shouldn't be studying we shouldn't be studying you shouldn't be studying they shouldn't be studying
Perfect
I shouldn't have studied you shouldn't have studied she shouldn't have studied we shouldn't have studied you shouldn't have studied they shouldn't have studied
V-ing perfect
I shouldn't have been studying you shouldn't have been studying she shouldn't have been studying we shouldn't have been studying you shouldn't have been studying they shouldn't 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
shouldn't I study? shouldn't you study? shouldn't she study? shouldn't we study? shouldn't you study? shouldn't they study?
V-ing form
shouldn't I be studying? shouldn't you be studying? shouldn't she be studying? shouldn't we be studying? shouldn't you be studying? shouldn't they be studying?
Perfect
shouldn't I have studied? shouldn't you have studied? shouldn't she have studied? shouldn't we have studied? shouldn't you have studied? shouldn't they have studied?
V-ing perfect
shouldn't I have been studying? shouldn't you have been studying? shouldn't she have been studying? shouldn't we have been studying? shouldn't you have been studying? shouldn't they have been studying?