I could birth you could birth he could birth we could birth you could birth they could birth
Forme en V-ing
I could be birthing you could be birthing he could be birthing we could be birthing you could be birthing they could be birthing
Perfect
I could have birthed you could have birthed he could have birthed we could have birthed you could have birthed they could have birthed
Perfect en V-ing
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
Négation
Forme simple
I couldn't birth you couldn't birth he couldn't birth we couldn't birth you couldn't birth they couldn't birth
Forme en V-ing
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
Perfect
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
Perfect en V-ing
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
Forme interrogative
Forme simple
could I birth? could you birth? could he birth? could we birth? could you birth? could they birth?
Forme en V-ing
could I be birthing? could you be birthing? could he be birthing? could we be birthing? could you be birthing? could they be birthing?
Perfect
could I have birthed? could you have birthed? could he have birthed? could we have birthed? could you have birthed? could they have birthed?
Perfect en V-ing
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?
Forme interro-négative
Forme simple
couldn't I birth? couldn't you birth? couldn't he birth? couldn't we birth? couldn't you birth? couldn't they birth?
Forme en V-ing
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?
Perfect
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?
Perfect en V-ing
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?