I should combat you should combat he should combat we should combat you should combat they should combat
V-ing form
I should be combating you should be combating he should be combating we should be combating you should be combating they should be combating
Perfect
I should have combated you should have combated he should have combated we should have combated you should have combated they should have combated
V-ing perfect
I should have been combating you should have been combating he should have been combating we should have been combating you should have been combating they should have been combating
Negation
Simple form
I should not combat you should not combat he should not combat we should not combat you should not combat they should not combat
V-ing form
I should not be combating you should not be combating he should not be combating we should not be combating you should not be combating they should not be combating
Perfect
I should not have combated you should not have combated he should not have combated we should not have combated you should not have combated they should not have combated
V-ing perfect
I should not have been combating you should not have been combating he should not have been combating we should not have been combating you should not have been combating they should not have been combating
Interrogative form
Simple form
should I combat? should you combat? should he combat? should we combat? should you combat? should they combat?
V-ing form
should I be combating? should you be combating? should he be combating? should we be combating? should you be combating? should they be combating?
Perfect
should I have combated? should you have combated? should he have combated? should we have combated? should you have combated? should they have combated?
V-ing perfect
should I have been combating? should you have been combating? should he have been combating? should we have been combating? should you have been combating? should they have been combating?
Interro-negative form
Simple form
should I not combat? should you not combat? should he not combat? should we not combat? should you not combat? should they not combat?
V-ing form
should I not be combating? should you not be combating? should he not be combating? should we not be combating? should you not be combating? should they not be combating?
Perfect
should I not have combated? should you not have combated? should he not have combated? should we not have combated? should you not have combated? should they not have combated?
V-ing perfect
should I not have been combating? should you not have been combating? should he not have been combating? should we not have been combating? should you not have been combating? should they not have been combating?