can snowball
Regular verb: snowball - snowballed- snowballed

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