I should cough you should cough he should cough we should cough you should cough they should cough
V-ing form
I should be coughing you should be coughing he should be coughing we should be coughing you should be coughing they should be coughing
Perfect
I should have coughed you should have coughed he should have coughed we should have coughed you should have coughed they should have coughed
V-ing perfect
I should have been coughing you should have been coughing he should have been coughing we should have been coughing you should have been coughing they should have been coughing
Negation
Simple form
I should not cough you should not cough he should not cough we should not cough you should not cough they should not cough
V-ing form
I should not be coughing you should not be coughing he should not be coughing we should not be coughing you should not be coughing they should not be coughing
Perfect
I should not have coughed you should not have coughed he should not have coughed we should not have coughed you should not have coughed they should not have coughed
V-ing perfect
I should not have been coughing you should not have been coughing he should not have been coughing we should not have been coughing you should not have been coughing they should not have been coughing
Interrogative form
Simple form
should I cough? should you cough? should he cough? should we cough? should you cough? should they cough?
V-ing form
should I be coughing? should you be coughing? should he be coughing? should we be coughing? should you be coughing? should they be coughing?
Perfect
should I have coughed? should you have coughed? should he 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 he have been coughing? should we have been coughing? should you have been coughing? should they have been coughing?
Interro-negative form
Simple form
should I not cough? should you not cough? should he not cough? should we not cough? should you not cough? should they not cough?
V-ing form
should I not be coughing? should you not be coughing? should he not be coughing? should we not be coughing? should you not be coughing? should they not be coughing?
Perfect
should I not have coughed? should you not have coughed? should he not have coughed? should we not have coughed? should you not have coughed? should they not have coughed?
V-ing perfect
should I not have been coughing? should you not have been coughing? should he not have been coughing? should we not have been coughing? should you not have been coughing? should they not have been coughing?