could pierce
Verbo regolare: pierce - pierced- pierced

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could pierce
you could pierce
he could pierce
we could pierce
you could pierce
they could pierce 	I could be piercing
you could be piercing
he could be piercing
we could be piercing
you could be piercing
they could be piercing	I could have pierced
you could have pierced
he could have pierced
we could have pierced
you could have pierced
they could have pierced	I could have been piercing
you could have been piercing
he could have been piercing
we could have been piercing
you could have been piercing
they could have been piercing	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I couldn't pierce
you couldn't pierce
he couldn't pierce
we couldn't pierce
you couldn't pierce
they couldn't pierce 	I couldn't be piercing
you couldn't be piercing
he couldn't be piercing
we couldn't be piercing
you couldn't be piercing
they couldn't be piercing	I couldn't have pierced
you couldn't have pierced
he couldn't have pierced
we couldn't have pierced
you couldn't have pierced
they couldn't have pierced	I couldn't have been piercing
you couldn't have been piercing
he couldn't have been piercing
we couldn't have been piercing
you couldn't have been piercing
they couldn't have been piercing	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I pierce?
could you pierce?
could he pierce?
could we pierce?
could you pierce?
could they pierce? 	could I be piercing?
could you be piercing?
could he be piercing?
could we be piercing?
could you be piercing?
could they be piercing? 	could I have pierced?
could you have pierced?
could he have pierced?
could we have pierced?
could you have pierced?
could they have pierced? 	could I have been piercing?
could you have been piercing?
could he have been piercing?
could we have been piercing?
could you have been piercing?
could they have been piercing? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
couldn't I pierce?
couldn't you pierce?
couldn't he pierce?
couldn't we pierce?
couldn't you pierce?
couldn't they pierce? 	couldn't I be piercing?
couldn't you be piercing?
couldn't he be piercing?
couldn't we be piercing?
couldn't you be piercing?
couldn't they be piercing? 	couldn't I have pierced?
couldn't you have pierced?
couldn't he have pierced?
couldn't we have pierced?
couldn't you have pierced?
couldn't they have pierced? 	couldn't I have been piercing?
couldn't you have been piercing?
couldn't he have been piercing?
couldn't we have been piercing?
couldn't you have been piercing?
couldn't they have been piercing?