I could antedate you could antedate she could antedate we could antedate you could antedate they could antedate
Forma com V-ing
I could be antedating you could be antedating she could be antedating we could be antedating you could be antedating they could be antedating
Perfeito
I could have antedated you could have antedated she 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 she could have been antedating we could have been antedating you could have been antedating they could have been antedating
Negação
Forma simple
I couldn't antedate you couldn't antedate she couldn't antedate we couldn't antedate you couldn't antedate they couldn't antedate
Forma com V-ing
I couldn't be antedating you couldn't be antedating she couldn't be antedating we couldn't be antedating you couldn't be antedating they couldn't be antedating
Perfeito
I couldn't have antedated you couldn't have antedated she couldn't have antedated we couldn't have antedated you couldn't have antedated they couldn't have antedated
Perfeito com V-ing
I couldn't have been antedating you couldn't have been antedating she couldn't have been antedating we couldn't have been antedating you couldn't have been antedating they couldn't have been antedating
Forma interrogativa
Forma simple
could I antedate? could you antedate? could she antedate? could we antedate? could you antedate? could they antedate?
Forma com V-ing
could I be antedating? could you be antedating? could she be antedating? could we be antedating? could you be antedating? could they be antedating?
Perfeito
could I have antedated? could you have antedated? could she 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 she have been antedating? could we have been antedating? could you have been antedating? could they have been antedating?
Forma interro-Negação
Forma simple
couldn't I antedate? couldn't you antedate? couldn't she antedate? couldn't we antedate? couldn't you antedate? couldn't they antedate?
Forma com V-ing
couldn't I be antedating? couldn't you be antedating? couldn't she be antedating? couldn't we be antedating? couldn't you be antedating? couldn't they be antedating?
Perfeito
couldn't I have antedated? couldn't you have antedated? couldn't she have antedated? couldn't we have antedated? couldn't you have antedated? couldn't they have antedated?
Perfeito com V-ing
couldn't I have been antedating? couldn't you have been antedating? couldn't she have been antedating? couldn't we have been antedating? couldn't you have been antedating? couldn't they have been antedating?