I should say you should say she should say we should say you should say they should say
V-ing form
I should be saying you should be saying she should be saying we should be saying you should be saying they should be saying
Perfect
I should have said you should have said she should have said we should have said you should have said they should have said
V-ing perfect
I should have been saying you should have been saying she should have been saying we should have been saying you should have been saying they should have been saying
Negation
Simple form
I should not say you should not say she should not say we should not say you should not say they should not say
V-ing form
I should not be saying you should not be saying she should not be saying we should not be saying you should not be saying they should not be saying
Perfect
I should not have said you should not have said she should not have said we should not have said you should not have said they should not have said
V-ing perfect
I should not have been saying you should not have been saying she should not have been saying we should not have been saying you should not have been saying they should not have been saying
Interrogative form
Simple form
should I say? should you say? should she say? should we say? should you say? should they say?
V-ing form
should I be saying? should you be saying? should she be saying? should we be saying? should you be saying? should they be saying?
Perfect
should I have said? should you have said? should she have said? should we have said? should you have said? should they have said?
V-ing perfect
should I have been saying? should you have been saying? should she have been saying? should we have been saying? should you have been saying? should they have been saying?
Interro-negative form
Simple form
should I not say? should you not say? should she not say? should we not say? should you not say? should they not say?
V-ing form
should I not be saying? should you not be saying? should she not be saying? should we not be saying? should you not be saying? should they not be saying?
Perfect
should I not have said? should you not have said? should she not have said? should we not have said? should you not have said? should they not have said?
V-ing perfect
should I not have been saying? should you not have been saying? should she not have been saying? should we not have been saying? should you not have been saying? should they not have been saying?