I should snowboard you should snowboard she should snowboard we should snowboard you should snowboard they should snowboard
V-ing form
I should be snowboarding you should be snowboarding she should be snowboarding we should be snowboarding you should be snowboarding they should be snowboarding
Perfect
I should have snowboarded you should have snowboarded she should have snowboarded we should have snowboarded you should have snowboarded they should have snowboarded
V-ing perfect
I should have been snowboarding you should have been snowboarding she should have been snowboarding we should have been snowboarding you should have been snowboarding they should have been snowboarding
Negation
Simple form
I should not snowboard you should not snowboard she should not snowboard we should not snowboard you should not snowboard they should not snowboard
V-ing form
I should not be snowboarding you should not be snowboarding she should not be snowboarding we should not be snowboarding you should not be snowboarding they should not be snowboarding
Perfect
I should not have snowboarded you should not have snowboarded she should not have snowboarded we should not have snowboarded you should not have snowboarded they should not have snowboarded
V-ing perfect
I should not have been snowboarding you should not have been snowboarding she should not have been snowboarding we should not have been snowboarding you should not have been snowboarding they should not have been snowboarding
Interrogative form
Simple form
should I snowboard? should you snowboard? should she snowboard? should we snowboard? should you snowboard? should they snowboard?
V-ing form
should I be snowboarding? should you be snowboarding? should she be snowboarding? should we be snowboarding? should you be snowboarding? should they be snowboarding?
Perfect
should I have snowboarded? should you have snowboarded? should she have snowboarded? should we have snowboarded? should you have snowboarded? should they have snowboarded?
V-ing perfect
should I have been snowboarding? should you have been snowboarding? should she have been snowboarding? should we have been snowboarding? should you have been snowboarding? should they have been snowboarding?
Interro-negative form
Simple form
should I not snowboard? should you not snowboard? should she not snowboard? should we not snowboard? should you not snowboard? should they not snowboard?
V-ing form
should I not be snowboarding? should you not be snowboarding? should she not be snowboarding? should we not be snowboarding? should you not be snowboarding? should they not be snowboarding?
Perfect
should I not have snowboarded? should you not have snowboarded? should she not have snowboarded? should we not have snowboarded? should you not have snowboarded? should they not have snowboarded?
V-ing perfect
should I not have been snowboarding? should you not have been snowboarding? should she not have been snowboarding? should we not have been snowboarding? should you not have been snowboarding? should they not have been snowboarding?