I should think you should think he should think we should think you should think they should think
V-ing form
I should be thinking you should be thinking he should be thinking we should be thinking you should be thinking they should be thinking
Perfect
I should have thought you should have thought he should have thought we should have thought you should have thought they should have thought
V-ing perfect
I should have been thinking you should have been thinking he should have been thinking we should have been thinking you should have been thinking they should have been thinking
Negation
Simple form
I should not think you should not think he should not think we should not think you should not think they should not think
V-ing form
I should not be thinking you should not be thinking he should not be thinking we should not be thinking you should not be thinking they should not be thinking
Perfect
I should not have thought you should not have thought he should not have thought we should not have thought you should not have thought they should not have thought
V-ing perfect
I should not have been thinking you should not have been thinking he should not have been thinking we should not have been thinking you should not have been thinking they should not have been thinking
Interrogative form
Simple form
should I think? should you think? should he think? should we think? should you think? should they think?
V-ing form
should I be thinking? should you be thinking? should he be thinking? should we be thinking? should you be thinking? should they be thinking?
Perfect
should I have thought? should you have thought? should he have thought? should we have thought? should you have thought? should they have thought?
V-ing perfect
should I have been thinking? should you have been thinking? should he have been thinking? should we have been thinking? should you have been thinking? should they have been thinking?
Interro-negative form
Simple form
should I not think? should you not think? should he not think? should we not think? should you not think? should they not think?
V-ing form
should I not be thinking? should you not be thinking? should he not be thinking? should we not be thinking? should you not be thinking? should they not be thinking?
Perfect
should I not have thought? should you not have thought? should he not have thought? should we not have thought? should you not have thought? should they not have thought?
V-ing perfect
should I not have been thinking? should you not have been thinking? should he not have been thinking? should we not have been thinking? should you not have been thinking? should they not have been thinking?