I could keen you could keen he could keen we could keen you could keen they could keen
Forma com V-ing
I could be keening you could be keening he could be keening we could be keening you could be keening they could be keening
Perfeito
I could have keened you could have keened he could have keened we could have keened you could have keened they could have keened
Perfeito com V-ing
I could have been keening you could have been keening he could have been keening we could have been keening you could have been keening they could have been keening
Negação
Forma simple
I couldn't keen you couldn't keen he couldn't keen we couldn't keen you couldn't keen they couldn't keen
Forma com V-ing
I couldn't be keening you couldn't be keening he couldn't be keening we couldn't be keening you couldn't be keening they couldn't be keening
Perfeito
I couldn't have keened you couldn't have keened he couldn't have keened we couldn't have keened you couldn't have keened they couldn't have keened
Perfeito com V-ing
I couldn't have been keening you couldn't have been keening he couldn't have been keening we couldn't have been keening you couldn't have been keening they couldn't have been keening
Forma interrogativa
Forma simple
could I keen? could you keen? could he keen? could we keen? could you keen? could they keen?
Forma com V-ing
could I be keening? could you be keening? could he be keening? could we be keening? could you be keening? could they be keening?
Perfeito
could I have keened? could you have keened? could he have keened? could we have keened? could you have keened? could they have keened?
Perfeito com V-ing
could I have been keening? could you have been keening? could he have been keening? could we have been keening? could you have been keening? could they have been keening?
Forma interro-Negação
Forma simple
couldn't I keen? couldn't you keen? couldn't he keen? couldn't we keen? couldn't you keen? couldn't they keen?
Forma com V-ing
couldn't I be keening? couldn't you be keening? couldn't he be keening? couldn't we be keening? couldn't you be keening? couldn't they be keening?
Perfeito
couldn't I have keened? couldn't you have keened? couldn't he have keened? couldn't we have keened? couldn't you have keened? couldn't they have keened?
Perfeito com V-ing
couldn't I have been keening? couldn't you have been keening? couldn't he have been keening? couldn't we have been keening? couldn't you have been keening? couldn't they have been keening?