can pierce
Verbo regular: pierce - pierced- pierced

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can pierce
you can pierce
he can pierce
we can pierce
you can pierce
they can pierce 	I can be piercing
you can be piercing
he can be piercing
we can be piercing
you can be piercing
they can be piercing	I can have pierced
you can have pierced
he can have pierced
we can have pierced
you can have pierced
they can have pierced	I can have been piercing
you can have been piercing
he can have been piercing
we can have been piercing
you can have been piercing
they can have been piercing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't pierce
you can't pierce
he can't pierce
we can't pierce
you can't pierce
they can't pierce 	I can't be piercing
you can't be piercing
he can't be piercing
we can't be piercing
you can't be piercing
they can't be piercing	I can't have pierced
you can't have pierced
he can't have pierced
we can't have pierced
you can't have pierced
they can't have pierced	I can't have been piercing
you can't have been piercing
he can't have been piercing
we can't have been piercing
you can't have been piercing
they can't have been piercing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I pierce?
can you pierce?
can he pierce?
can we pierce?
can you pierce?
can they pierce? 	can I be piercing?
can you be piercing?
can he be piercing?
can we be piercing?
can you be piercing?
can they be piercing? 	can I have pierced?
can you have pierced?
can he have pierced?
can we have pierced?
can you have pierced?
can they have pierced? 	can I have been piercing?
can you have been piercing?
can he have been piercing?
can we have been piercing?
can you have been piercing?
can they have been piercing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I pierce?
can't you pierce?
can't he pierce?
can't we pierce?
can't you pierce?
can't they pierce? 	can't I be piercing?
can't you be piercing?
can't he be piercing?
can't we be piercing?
can't you be piercing?
can't they be piercing? 	can't I have pierced?
can't you have pierced?
can't he have pierced?
can't we have pierced?
can't you have pierced?
can't they have pierced? 	can't I have been piercing?
can't you have been piercing?
can't he have been piercing?
can't we have been piercing?
can't you have been piercing?
can't they have been piercing?