I could testify you could testify he could testify we could testify you could testify they could testify
Forma com V-ing
I could be testifying you could be testifying he could be testifying we could be testifying you could be testifying they could be testifying
Perfeito
I could have testified you could have testified he could have testified we could have testified you could have testified they could have testified
Perfeito com V-ing
I could have been testifying you could have been testifying he could have been testifying we could have been testifying you could have been testifying they could have been testifying
Negação
Forma simple
I could not testify you could not testify he could not testify we could not testify you could not testify they could not testify
Forma com V-ing
I could not be testifying you could not be testifying he could not be testifying we could not be testifying you could not be testifying they could not be testifying
Perfeito
I could not have testified you could not have testified he could not have testified we could not have testified you could not have testified they could not have testified
Perfeito com V-ing
I could not have been testifying you could not have been testifying he could not have been testifying we could not have been testifying you could not have been testifying they could not have been testifying
Forma interrogativa
Forma simple
could I testify? could you testify? could he testify? could we testify? could you testify? could they testify?
Forma com V-ing
could I be testifying? could you be testifying? could he be testifying? could we be testifying? could you be testifying? could they be testifying?
Perfeito
could I have testified? could you have testified? could he have testified? could we have testified? could you have testified? could they have testified?
Perfeito com V-ing
could I have been testifying? could you have been testifying? could he have been testifying? could we have been testifying? could you have been testifying? could they have been testifying?
Forma interro-Negação
Forma simple
could I not testify? could you not testify? could he not testify? could we not testify? could you not testify? could they not testify?
Forma com V-ing
could I not be testifying? could you not be testifying? could he not be testifying? could we not be testifying? could you not be testifying? could they not be testifying?
Perfeito
could I not have testified? could you not have testified? could he not have testified? could we not have testified? could you not have testified? could they not have testified?
Perfeito com V-ing
could I not have been testifying? could you not have been testifying? could he not have been testifying? could we not have been testifying? could you not have been testifying? could they not have been testifying?