I could antedate you could antedate he could antedate we could antedate you could antedate they could antedate
Forma com V-ing
I could be antedating you could be antedating he could be antedating we could be antedating you could be antedating they could be antedating
Perfeito
I could have antedated you could have antedated he could have antedated we could have antedated you could have antedated they could have antedated
Perfeito com V-ing
I could have been antedating you could have been antedating he could have been antedating we could have been antedating you could have been antedating they could have been antedating
Negação
Forma simple
I could not antedate you could not antedate he could not antedate we could not antedate you could not antedate they could not antedate
Forma com V-ing
I could not be antedating you could not be antedating he could not be antedating we could not be antedating you could not be antedating they could not be antedating
Perfeito
I could not have antedated you could not have antedated he could not have antedated we could not have antedated you could not have antedated they could not have antedated
Perfeito com V-ing
I could not have been antedating you could not have been antedating he could not have been antedating we could not have been antedating you could not have been antedating they could not have been antedating
Forma interrogativa
Forma simple
could I antedate? could you antedate? could he antedate? could we antedate? could you antedate? could they antedate?
Forma com V-ing
could I be antedating? could you be antedating? could he be antedating? could we be antedating? could you be antedating? could they be antedating?
Perfeito
could I have antedated? could you have antedated? could he have antedated? could we have antedated? could you have antedated? could they have antedated?
Perfeito com V-ing
could I have been antedating? could you have been antedating? could he have been antedating? could we have been antedating? could you have been antedating? could they have been antedating?
Forma interro-Negação
Forma simple
could I not antedate? could you not antedate? could he not antedate? could we not antedate? could you not antedate? could they not antedate?
Forma com V-ing
could I not be antedating? could you not be antedating? could he not be antedating? could we not be antedating? could you not be antedating? could they not be antedating?
Perfeito
could I not have antedated? could you not have antedated? could he not have antedated? could we not have antedated? could you not have antedated? could they not have antedated?
Perfeito com V-ing
could I not have been antedating? could you not have been antedating? could he not have been antedating? could we not have been antedating? could you not have been antedating? could they not have been antedating?