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