I can mast you can mast he can mast we can mast you can mast they can mast
Forma con V-ing
I can be masting you can be masting he can be masting we can be masting you can be masting they can be masting
Perfecto
I can have masted you can have masted he can have masted we can have masted you can have masted they can have masted
Perfecto con V-ing
I can have been masting you can have been masting he can have been masting we can have been masting you can have been masting they can have been masting
Negación
Forma simple
I can't mast you can't mast he can't mast we can't mast you can't mast they can't mast
Forma con V-ing
I can't be masting you can't be masting he can't be masting we can't be masting you can't be masting they can't be masting
Perfecto
I can't have masted you can't have masted he can't have masted we can't have masted you can't have masted they can't have masted
Perfecto con V-ing
I can't have been masting you can't have been masting he can't have been masting we can't have been masting you can't have been masting they can't have been masting
Forma interrogativa
Forma simple
can I mast? can you mast? can he mast? can we mast? can you mast? can they mast?
Forma con V-ing
can I be masting? can you be masting? can he be masting? can we be masting? can you be masting? can they be masting?
Perfecto
can I have masted? can you have masted? can he have masted? can we have masted? can you have masted? can they have masted?
Perfecto con V-ing
can I have been masting? can you have been masting? can he have been masting? can we have been masting? can you have been masting? can they have been masting?
Forma interro-negativa
Forma simple
can't I mast? can't you mast? can't he mast? can't we mast? can't you mast? can't they mast?
Forma con V-ing
can't I be masting? can't you be masting? can't he be masting? can't we be masting? can't you be masting? can't they be masting?
Perfecto
can't I have masted? can't you have masted? can't he have masted? can't we have masted? can't you have masted? can't they have masted?
Perfecto con V-ing
can't I have been masting? can't you have been masting? can't he have been masting? can't we have been masting? can't you have been masting? can't they have been masting?