can stone
Verbo regular: stone - stoned- stoned

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can stone
you can stone
he can stone
we can stone
you can stone
they can stone 	I can be stoning
you can be stoning
he can be stoning
we can be stoning
you can be stoning
they can be stoning	I can have stoned
you can have stoned
he can have stoned
we can have stoned
you can have stoned
they can have stoned	I can have been stoning
you can have been stoning
he can have been stoning
we can have been stoning
you can have been stoning
they can have been stoning	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot stone
you cannot stone
he cannot stone
we cannot stone
you cannot stone
they cannot stone 	I cannot be stoning
you cannot be stoning
he cannot be stoning
we cannot be stoning
you cannot be stoning
they cannot be stoning	I cannot have stoned
you cannot have stoned
he cannot have stoned
we cannot have stoned
you cannot have stoned
they cannot have stoned	I cannot have been stoning
you cannot have been stoning
he cannot have been stoning
we cannot have been stoning
you cannot have been stoning
they cannot have been stoning	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I stone?
can you stone?
can he stone?
can we stone?
can you stone?
can they stone? 	can I be stoning?
can you be stoning?
can he be stoning?
can we be stoning?
can you be stoning?
can they be stoning? 	can I have stoned?
can you have stoned?
can he have stoned?
can we have stoned?
can you have stoned?
can they have stoned? 	can I have been stoning?
can you have been stoning?
can he have been stoning?
can we have been stoning?
can you have been stoning?
can they have been stoning? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not stone?
can you not stone?
can he not stone?
can we not stone?
can you not stone?
can they not stone? 	can I not be stoning?
can you not be stoning?
can he not be stoning?
can we not be stoning?
can you not be stoning?
can they not be stoning? 	can I not have stoned?
can you not have stoned?
can he not have stoned?
can we not have stoned?
can you not have stoned?
can they not have stoned? 	can I not have been stoning?
can you not have been stoning?
can he not have been stoning?
can we not have been stoning?
can you not have been stoning?
can they not have been stoning?