can snowball
Verbo regular: snowball - snowballed- snowballed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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	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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot snowball
you cannot snowball
he cannot snowball
we cannot snowball
you cannot snowball
they cannot snowball 	I cannot be snowballing
you cannot be snowballing
he cannot be snowballing
we cannot be snowballing
you cannot be snowballing
they cannot be snowballing	I cannot have snowballed
you cannot have snowballed
he cannot have snowballed
we cannot have snowballed
you cannot have snowballed
they cannot have snowballed	I cannot have been snowballing
you cannot have been snowballing
he cannot have been snowballing
we cannot have been snowballing
you cannot have been snowballing
they cannot have been snowballing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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? 	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? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not snowball?
can you not snowball?
can he not snowball?
can we not snowball?
can you not snowball?
can they not snowball? 	can I not be snowballing?
can you not be snowballing?
can he not be snowballing?
can we not be snowballing?
can you not be snowballing?
can they not be snowballing? 	can I not have snowballed?
can you not have snowballed?
can he not have snowballed?
can we not have snowballed?
can you not have snowballed?
can they not have snowballed? 	can I not have been snowballing?
can you not have been snowballing?
can he not have been snowballing?
can we not have been snowballing?
can you not have been snowballing?
can they not have been snowballing?