I should say you should say he should say we should say you should say they should say
V-ing form
I should be saying you should be saying he should be saying we should be saying you should be saying they should be saying
Perfect
I should have said you should have said he 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 he 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 he 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 he 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 he 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 he 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 he say? should we say? should you say? should they say?
V-ing form
should I be saying? should you be saying? should he be saying? should we be saying? should you be saying? should they be saying?
Perfect
should I have said? should you have said? should he 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 he 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 he 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 he 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 he 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 he not have been saying? should we not have been saying? should you not have been saying? should they not have been saying?