I could birth you could birth she could birth we could birth you could birth they could birth
Forma com V-ing
I could be birthing you could be birthing she could be birthing we could be birthing you could be birthing they could be birthing
Perfeito
I could have birthed you could have birthed she could have birthed we could have birthed you could have birthed they could have birthed
Perfeito com V-ing
I could have been birthing you could have been birthing she could have been birthing we could have been birthing you could have been birthing they could have been birthing
Negação
Forma simple
I couldn't birth you couldn't birth she couldn't birth we couldn't birth you couldn't birth they couldn't birth
Forma com V-ing
I couldn't be birthing you couldn't be birthing she couldn't be birthing we couldn't be birthing you couldn't be birthing they couldn't be birthing
Perfeito
I couldn't have birthed you couldn't have birthed she couldn't have birthed we couldn't have birthed you couldn't have birthed they couldn't have birthed
Perfeito com V-ing
I couldn't have been birthing you couldn't have been birthing she couldn't have been birthing we couldn't have been birthing you couldn't have been birthing they couldn't have been birthing
Forma interrogativa
Forma simple
could I birth? could you birth? could she birth? could we birth? could you birth? could they birth?
Forma com V-ing
could I be birthing? could you be birthing? could she be birthing? could we be birthing? could you be birthing? could they be birthing?
Perfeito
could I have birthed? could you have birthed? could she have birthed? could we have birthed? could you have birthed? could they have birthed?
Perfeito com V-ing
could I have been birthing? could you have been birthing? could she have been birthing? could we have been birthing? could you have been birthing? could they have been birthing?
Forma interro-Negação
Forma simple
couldn't I birth? couldn't you birth? couldn't she birth? couldn't we birth? couldn't you birth? couldn't they birth?
Forma com V-ing
couldn't I be birthing? couldn't you be birthing? couldn't she be birthing? couldn't we be birthing? couldn't you be birthing? couldn't they be birthing?
Perfeito
couldn't I have birthed? couldn't you have birthed? couldn't she have birthed? couldn't we have birthed? couldn't you have birthed? couldn't they have birthed?
Perfeito com V-ing
couldn't I have been birthing? couldn't you have been birthing? couldn't she have been birthing? couldn't we have been birthing? couldn't you have been birthing? couldn't they have been birthing?