English verb conjugation
SHOULD SNOWBALL

Regular verb: snowball - snowballed - snowballed

Affirmation

Simple form	V-ing form
I should snowball you should snowball she should snowball we should snowball you should snowball they should snowball	I should be snowballing you should be snowballing she should be snowballing we should be snowballing you should be snowballing they should be snowballing
Perfect	V-ing perfect
I should have snowballed you should have snowballed she should have snowballed we should have snowballed you should have snowballed they should have snowballed	I should have been snowballing you should have been snowballing she should have been snowballing we should have been snowballing you should have been snowballing they should have been snowballing

Negation

Simple form	V-ing form
I should not snowball you should not snowball she should not snowball we should not snowball you should not snowball they should not snowball	I should not be snowballing you should not be snowballing she should not be snowballing we should not be snowballing you should not be snowballing they should not be snowballing
Perfect	V-ing perfect
I should not have snowballed you should not have snowballed she should not have snowballed we should not have snowballed you should not have snowballed they should not have snowballed	I should not have been snowballing you should not have been snowballing she 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	V-ing form
should I snowball? should you snowball? should she snowball? should we snowball? should you snowball? should they snowball?	should I be snowballing? should you be snowballing? should she be snowballing? should we be snowballing? should you be snowballing? should they be snowballing?
Perfect	V-ing perfect
should I have snowballed? should you have snowballed? should she have snowballed? should we have snowballed? should you have snowballed? should they have snowballed?	should I have been snowballing? should you have been snowballing? should she have been snowballing? should we have been snowballing? should you have been snowballing? should they have been snowballing?

Interro-negative form

Simple form	V-ing form
should I not snowball? should you not snowball? should she not snowball? should we not snowball? should you not snowball? should they not snowball?	should I not be snowballing? should you not be snowballing? should she not be snowballing? should we not be snowballing? should you not be snowballing? should they not be snowballing?
Perfect	V-ing perfect
should I not have snowballed? should you not have snowballed? should she not have snowballed? should we not have snowballed? should you not have snowballed? should they not have snowballed?	should I not have been snowballing? should you not have been snowballing? should she not have been snowballing? should we not have been snowballing? should you not have been snowballing? should they not have been snowballing?