I should stumble you should stumble she should stumble we should stumble you should stumble they should stumble
V-ing form
I should be stumbling you should be stumbling she should be stumbling we should be stumbling you should be stumbling they should be stumbling
Perfect
I should have stumbled you should have stumbled she should have stumbled we should have stumbled you should have stumbled they should have stumbled
V-ing perfect
I should have been stumbling you should have been stumbling she should have been stumbling we should have been stumbling you should have been stumbling they should have been stumbling
Negation
Simple form
I should not stumble you should not stumble she should not stumble we should not stumble you should not stumble they should not stumble
V-ing form
I should not be stumbling you should not be stumbling she should not be stumbling we should not be stumbling you should not be stumbling they should not be stumbling
Perfect
I should not have stumbled you should not have stumbled she should not have stumbled we should not have stumbled you should not have stumbled they should not have stumbled
V-ing perfect
I should not have been stumbling you should not have been stumbling she should not have been stumbling we should not have been stumbling you should not have been stumbling they should not have been stumbling
Interrogative form
Simple form
should I stumble? should you stumble? should she stumble? should we stumble? should you stumble? should they stumble?
V-ing form
should I be stumbling? should you be stumbling? should she be stumbling? should we be stumbling? should you be stumbling? should they be stumbling?
Perfect
should I have stumbled? should you have stumbled? should she have stumbled? should we have stumbled? should you have stumbled? should they have stumbled?
V-ing perfect
should I have been stumbling? should you have been stumbling? should she have been stumbling? should we have been stumbling? should you have been stumbling? should they have been stumbling?
Interro-negative form
Simple form
should I not stumble? should you not stumble? should she not stumble? should we not stumble? should you not stumble? should they not stumble?
V-ing form
should I not be stumbling? should you not be stumbling? should she not be stumbling? should we not be stumbling? should you not be stumbling? should they not be stumbling?
Perfect
should I not have stumbled? should you not have stumbled? should she not have stumbled? should we not have stumbled? should you not have stumbled? should they not have stumbled?
V-ing perfect
should I not have been stumbling? should you not have been stumbling? should she not have been stumbling? should we not have been stumbling? should you not have been stumbling? should they not have been stumbling?