I'd be coughing you'd be coughing she'd be coughing we'd be coughing you'd be coughing they'd be coughing
Perfect
I should've coughed you should've coughed she should've coughed we should've coughed you should've coughed they should've coughed
V-ing perfect
I should've been coughing you should've been coughing she should've been coughing we should've been coughing you should've been coughing they should've been coughing
Negation
Simple form
I shouldn't cough you shouldn't cough she shouldn't cough we shouldn't cough you shouldn't cough they shouldn't cough
V-ing form
I shouldn't be coughing you shouldn't be coughing she shouldn't be coughing we shouldn't be coughing you shouldn't be coughing they shouldn't be coughing
Perfect
I shouldn't have coughed you shouldn't have coughed she shouldn't have coughed we shouldn't have coughed you shouldn't have coughed they shouldn't have coughed
V-ing perfect
I shouldn't have been coughing you shouldn't have been coughing she shouldn't have been coughing we shouldn't have been coughing you shouldn't have been coughing they shouldn't have been coughing
Interrogative form
Simple form
should I cough? should you cough? should she cough? should we cough? should you cough? should they cough?
V-ing form
should I be coughing? should you be coughing? should she be coughing? should we be coughing? should you be coughing? should they be coughing?
Perfect
should I have coughed? should you have coughed? should she have coughed? should we have coughed? should you have coughed? should they have coughed?
V-ing perfect
should I have been coughing? should you have been coughing? should she have been coughing? should we have been coughing? should you have been coughing? should they have been coughing?
Interro-negative form
Simple form
shouldn't I cough? shouldn't you cough? shouldn't she cough? shouldn't we cough? shouldn't you cough? shouldn't they cough?
V-ing form
shouldn't I be coughing? shouldn't you be coughing? shouldn't she be coughing? shouldn't we be coughing? shouldn't you be coughing? shouldn't they be coughing?
Perfect
shouldn't I have coughed? shouldn't you have coughed? shouldn't she have coughed? shouldn't we have coughed? shouldn't you have coughed? shouldn't they have coughed?
V-ing perfect
shouldn't I have been coughing? shouldn't you have been coughing? shouldn't she have been coughing? shouldn't we have been coughing? shouldn't you have been coughing? shouldn't they have been coughing?