I should protest you should protest he should protest we should protest you should protest they should protest
V-ing form
I should be protesting you should be protesting he should be protesting we should be protesting you should be protesting they should be protesting
Perfect
I should have protested you should have protested he should have protested we should have protested you should have protested they should have protested
V-ing perfect
I should have been protesting you should have been protesting he should have been protesting we should have been protesting you should have been protesting they should have been protesting
Negation
Simple form
I should not protest you should not protest he should not protest we should not protest you should not protest they should not protest
V-ing form
I should not be protesting you should not be protesting he should not be protesting we should not be protesting you should not be protesting they should not be protesting
Perfect
I should not have protested you should not have protested he should not have protested we should not have protested you should not have protested they should not have protested
V-ing perfect
I should not have been protesting you should not have been protesting he should not have been protesting we should not have been protesting you should not have been protesting they should not have been protesting
Interrogative form
Simple form
should I protest? should you protest? should he protest? should we protest? should you protest? should they protest?
V-ing form
should I be protesting? should you be protesting? should he be protesting? should we be protesting? should you be protesting? should they be protesting?
Perfect
should I have protested? should you have protested? should he have protested? should we have protested? should you have protested? should they have protested?
V-ing perfect
should I have been protesting? should you have been protesting? should he have been protesting? should we have been protesting? should you have been protesting? should they have been protesting?
Interro-negative form
Simple form
should I not protest? should you not protest? should he not protest? should we not protest? should you not protest? should they not protest?
V-ing form
should I not be protesting? should you not be protesting? should he not be protesting? should we not be protesting? should you not be protesting? should they not be protesting?
Perfect
should I not have protested? should you not have protested? should he not have protested? should we not have protested? should you not have protested? should they not have protested?
V-ing perfect
should I not have been protesting? should you not have been protesting? should he not have been protesting? should we not have been protesting? should you not have been protesting? should they not have been protesting?