English verb conjugation
CAN SNOWBALL

Regular verb: snowball - snowballed - snowballed

Affirmation

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

Negation

Simple form	V-ing form
I can't snowball you can't snowball he can't snowball we can't snowball you can't snowball they can't snowball	I can't be snowballing you can't be snowballing he can't be snowballing we can't be snowballing you can't be snowballing they can't be snowballing
Perfect	V-ing perfect
I can't have snowballed you can't have snowballed he can't have snowballed we can't have snowballed you can't have snowballed they can't have snowballed	I can't have been snowballing you can't have been snowballing he can't have been snowballing we can't have been snowballing you can't have been snowballing they can't have been snowballing

Interrogative form

Simple form	V-ing form
can I snowball? can you snowball? can he snowball? can we snowball? can you snowball? can they snowball?	can I be snowballing? can you be snowballing? can he be snowballing? can we be snowballing? can you be snowballing? can they be snowballing?
Perfect	V-ing perfect
can I have snowballed? can you have snowballed? can he have snowballed? can we have snowballed? can you have snowballed? can they have snowballed?	can I have been snowballing? can you have been snowballing? can he have been snowballing? can we have been snowballing? can you have been snowballing? can they have been snowballing?

Interro-negative form

Simple form	V-ing form
can't I snowball? can't you snowball? can't he snowball? can't we snowball? can't you snowball? can't they snowball?	can't I be snowballing? can't you be snowballing? can't he be snowballing? can't we be snowballing? can't you be snowballing? can't they be snowballing?
Perfect	V-ing perfect
can't I have snowballed? can't you have snowballed? can't he have snowballed? can't we have snowballed? can't you have snowballed? can't they have snowballed?	can't I have been snowballing? can't you have been snowballing? can't he have been snowballing? can't we have been snowballing? can't you have been snowballing? can't they have been snowballing?