I should ask you should ask he should ask we should ask you should ask they should ask
V-ing form
I should be asking you should be asking he should be asking we should be asking you should be asking they should be asking
Perfect
I should have asked you should have asked he should have asked we should have asked you should have asked they should have asked
V-ing perfect
I should have been asking you should have been asking he should have been asking we should have been asking you should have been asking they should have been asking
Negation
Simple form
I should not ask you should not ask he should not ask we should not ask you should not ask they should not ask
V-ing form
I should not be asking you should not be asking he should not be asking we should not be asking you should not be asking they should not be asking
Perfect
I should not have asked you should not have asked he should not have asked we should not have asked you should not have asked they should not have asked
V-ing perfect
I should not have been asking you should not have been asking he should not have been asking we should not have been asking you should not have been asking they should not have been asking
Interrogative form
Simple form
should I ask? should you ask? should he ask? should we ask? should you ask? should they ask?
V-ing form
should I be asking? should you be asking? should he be asking? should we be asking? should you be asking? should they be asking?
Perfect
should I have asked? should you have asked? should he have asked? should we have asked? should you have asked? should they have asked?
V-ing perfect
should I have been asking? should you have been asking? should he have been asking? should we have been asking? should you have been asking? should they have been asking?
Interro-negative form
Simple form
should I not ask? should you not ask? should he not ask? should we not ask? should you not ask? should they not ask?
V-ing form
should I not be asking? should you not be asking? should he not be asking? should we not be asking? should you not be asking? should they not be asking?
Perfect
should I not have asked? should you not have asked? should he not have asked? should we not have asked? should you not have asked? should they not have asked?
V-ing perfect
should I not have been asking? should you not have been asking? should he not have been asking? should we not have been asking? should you not have been asking? should they not have been asking?