I can sire you can sire she can sire we can sire you can sire they can sire
Forma com V-ing
I can be siring you can be siring she can be siring we can be siring you can be siring they can be siring
Perfeito
I can have sired you can have sired she can have sired we can have sired you can have sired they can have sired
Perfeito com V-ing
I can have been siring you can have been siring she can have been siring we can have been siring you can have been siring they can have been siring
Negação
Forma simple
I can't sire you can't sire she can't sire we can't sire you can't sire they can't sire
Forma com V-ing
I can't be siring you can't be siring she can't be siring we can't be siring you can't be siring they can't be siring
Perfeito
I can't have sired you can't have sired she can't have sired we can't have sired you can't have sired they can't have sired
Perfeito com V-ing
I can't have been siring you can't have been siring she can't have been siring we can't have been siring you can't have been siring they can't have been siring
Forma interrogativa
Forma simple
can I sire? can you sire? can she sire? can we sire? can you sire? can they sire?
Forma com V-ing
can I be siring? can you be siring? can she be siring? can we be siring? can you be siring? can they be siring?
Perfeito
can I have sired? can you have sired? can she have sired? can we have sired? can you have sired? can they have sired?
Perfeito com V-ing
can I have been siring? can you have been siring? can she have been siring? can we have been siring? can you have been siring? can they have been siring?
Forma interro-Negação
Forma simple
can't I sire? can't you sire? can't she sire? can't we sire? can't you sire? can't they sire?
Forma com V-ing
can't I be siring? can't you be siring? can't she be siring? can't we be siring? can't you be siring? can't they be siring?
Perfeito
can't I have sired? can't you have sired? can't she have sired? can't we have sired? can't you have sired? can't they have sired?
Perfeito com V-ing
can't I have been siring? can't you have been siring? can't she have been siring? can't we have been siring? can't you have been siring? can't they have been siring?