I should fool you should fool he should fool we should fool you should fool they should fool
V-ing form
I should be fooling you should be fooling he should be fooling we should be fooling you should be fooling they should be fooling
Perfect
I should have fooled you should have fooled he should have fooled we should have fooled you should have fooled they should have fooled
V-ing perfect
I should have been fooling you should have been fooling he should have been fooling we should have been fooling you should have been fooling they should have been fooling
Negation
Simple form
I should not fool you should not fool he should not fool we should not fool you should not fool they should not fool
V-ing form
I should not be fooling you should not be fooling he should not be fooling we should not be fooling you should not be fooling they should not be fooling
Perfect
I should not have fooled you should not have fooled he should not have fooled we should not have fooled you should not have fooled they should not have fooled
V-ing perfect
I should not have been fooling you should not have been fooling he should not have been fooling we should not have been fooling you should not have been fooling they should not have been fooling
Interrogative form
Simple form
should I fool? should you fool? should he fool? should we fool? should you fool? should they fool?
V-ing form
should I be fooling? should you be fooling? should he be fooling? should we be fooling? should you be fooling? should they be fooling?
Perfect
should I have fooled? should you have fooled? should he have fooled? should we have fooled? should you have fooled? should they have fooled?
V-ing perfect
should I have been fooling? should you have been fooling? should he have been fooling? should we have been fooling? should you have been fooling? should they have been fooling?
Interro-negative form
Simple form
should I not fool? should you not fool? should he not fool? should we not fool? should you not fool? should they not fool?
V-ing form
should I not be fooling? should you not be fooling? should he not be fooling? should we not be fooling? should you not be fooling? should they not be fooling?
Perfect
should I not have fooled? should you not have fooled? should he not have fooled? should we not have fooled? should you not have fooled? should they not have fooled?
V-ing perfect
should I not have been fooling? should you not have been fooling? should he not have been fooling? should we not have been fooling? should you not have been fooling? should they not have been fooling?