Conjugación del verbo inglés
COULD MAST

Verbo regular: mast - masted - masted

Afirmación

Forma simple	Forma con V-ing
I could mast you could mast she could mast we could mast you could mast they could mast	I could be masting you could be masting she could be masting we could be masting you could be masting they could be masting
Perfecto	Perfecto con V-ing
I could have masted you could have masted she could have masted we could have masted you could have masted they could have masted	I could have been masting you could have been masting she could have been masting we could have been masting you could have been masting they could have been masting

Negación

Forma simple	Forma con V-ing
I couldn't mast you couldn't mast she couldn't mast we couldn't mast you couldn't mast they couldn't mast	I couldn't be masting you couldn't be masting she couldn't be masting we couldn't be masting you couldn't be masting they couldn't be masting
Perfecto	Perfecto con V-ing
I couldn't have masted you couldn't have masted she couldn't have masted we couldn't have masted you couldn't have masted they couldn't have masted	I couldn't have been masting you couldn't have been masting she couldn't have been masting we couldn't have been masting you couldn't have been masting they couldn't have been masting

Forma interrogativa

Forma simple	Forma con V-ing
could I mast? could you mast? could she mast? could we mast? could you mast? could they mast?	could I be masting? could you be masting? could she be masting? could we be masting? could you be masting? could they be masting?
Perfecto	Perfecto con V-ing
could I have masted? could you have masted? could she have masted? could we have masted? could you have masted? could they have masted?	could I have been masting? could you have been masting? could she have been masting? could we have been masting? could you have been masting? could they have been masting?

Forma interro-negativa

Forma simple	Forma con V-ing
couldn't I mast? couldn't you mast? couldn't she mast? couldn't we mast? couldn't you mast? couldn't they mast?	couldn't I be masting? couldn't you be masting? couldn't she be masting? couldn't we be masting? couldn't you be masting? couldn't they be masting?
Perfecto	Perfecto con V-ing
couldn't I have masted? couldn't you have masted? couldn't she have masted? couldn't we have masted? couldn't you have masted? couldn't they have masted?	couldn't I have been masting? couldn't you have been masting? couldn't she have been masting? couldn't we have been masting? couldn't you have been masting? couldn't they have been masting?