I should snowball you should snowball he should snowball we should snowball you should snowball they should snowball
V-ing form
I should be snowballing you should be snowballing he should be snowballing we should be snowballing you should be snowballing they should be snowballing
Perfect
I should have snowballed you should have snowballed he should have snowballed we should have snowballed you should have snowballed they should have snowballed
V-ing perfect
I should have been snowballing you should have been snowballing he should have been snowballing we should have been snowballing you should have been snowballing they should have been snowballing
Negation
Simple form
I should not snowball you should not snowball he should not snowball we should not snowball you should not snowball they should not snowball
V-ing form
I should not be snowballing you should not be snowballing he should not be snowballing we should not be snowballing you should not be snowballing they should not be snowballing
Perfect
I should not have snowballed you should not have snowballed he should not have snowballed we should not have snowballed you should not have snowballed they should not have snowballed
V-ing perfect
I should not have been snowballing you should not have been snowballing he should not have been snowballing we should not have been snowballing you should not have been snowballing they should not have been snowballing
Interrogative form
Simple form
should I snowball? should you snowball? should he snowball? should we snowball? should you snowball? should they snowball?
V-ing form
should I be snowballing? should you be snowballing? should he be snowballing? should we be snowballing? should you be snowballing? should they be snowballing?
Perfect
should I have snowballed? should you have snowballed? should he have snowballed? should we have snowballed? should you have snowballed? should they have snowballed?
V-ing perfect
should I have been snowballing? should you have been snowballing? should he have been snowballing? should we have been snowballing? should you have been snowballing? should they have been snowballing?
Interro-negative form
Simple form
should I not snowball? should you not snowball? should he not snowball? should we not snowball? should you not snowball? should they not snowball?
V-ing form
should I not be snowballing? should you not be snowballing? should he not be snowballing? should we not be snowballing? should you not be snowballing? should they not be snowballing?
Perfect
should I not have snowballed? should you not have snowballed? should he not have snowballed? should we not have snowballed? should you not have snowballed? should they not have snowballed?
V-ing perfect
should I not have been snowballing? should you not have been snowballing? should he not have been snowballing? should we not have been snowballing? should you not have been snowballing? should they not have been snowballing?