I could commence you could commence she could commence we could commence you could commence they could commence
Forma com V-ing
I could be commencing you could be commencing she could be commencing we could be commencing you could be commencing they could be commencing
Perfeito
I could have commenced you could have commenced she could have commenced we could have commenced you could have commenced they could have commenced
Perfeito com V-ing
I could have been commencing you could have been commencing she could have been commencing we could have been commencing you could have been commencing they could have been commencing
Negação
Forma simple
I could not commence you could not commence she could not commence we could not commence you could not commence they could not commence
Forma com V-ing
I could not be commencing you could not be commencing she could not be commencing we could not be commencing you could not be commencing they could not be commencing
Perfeito
I could not have commenced you could not have commenced she could not have commenced we could not have commenced you could not have commenced they could not have commenced
Perfeito com V-ing
I could not have been commencing you could not have been commencing she could not have been commencing we could not have been commencing you could not have been commencing they could not have been commencing
Forma interrogativa
Forma simple
could I commence? could you commence? could she commence? could we commence? could you commence? could they commence?
Forma com V-ing
could I be commencing? could you be commencing? could she be commencing? could we be commencing? could you be commencing? could they be commencing?
Perfeito
could I have commenced? could you have commenced? could she have commenced? could we have commenced? could you have commenced? could they have commenced?
Perfeito com V-ing
could I have been commencing? could you have been commencing? could she have been commencing? could we have been commencing? could you have been commencing? could they have been commencing?
Forma interro-Negação
Forma simple
could I not commence? could you not commence? could she not commence? could we not commence? could you not commence? could they not commence?
Forma com V-ing
could I not be commencing? could you not be commencing? could she not be commencing? could we not be commencing? could you not be commencing? could they not be commencing?
Perfeito
could I not have commenced? could you not have commenced? could she not have commenced? could we not have commenced? could you not have commenced? could they not have commenced?
Perfeito com V-ing
could I not have been commencing? could you not have been commencing? could she not have been commencing? could we not have been commencing? could you not have been commencing? could they not have been commencing?