could birth
Verbo regular: birth - birthed- birthed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could birth
you could birth
he could birth
we could birth
you could birth
they could birth 	I could be birthing
you could be birthing
he could be birthing
we could be birthing
you could be birthing
they could be birthing	I could have birthed
you could have birthed
he could have birthed
we could have birthed
you could have birthed
they could have birthed	I could have been birthing
you could have been birthing
he could have been birthing
we could have been birthing
you could have been birthing
they could have been birthing	

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

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