I could retreat you could retreat he could retreat we could retreat you could retreat they could retreat
Forma com V-ing
I could be retreating you could be retreating he could be retreating we could be retreating you could be retreating they could be retreating
Perfeito
I could have retreated you could have retreated he could have retreated we could have retreated you could have retreated they could have retreated
Perfeito com V-ing
I could have been retreating you could have been retreating he could have been retreating we could have been retreating you could have been retreating they could have been retreating
Negação
Forma simple
I couldn't retreat you couldn't retreat he couldn't retreat we couldn't retreat you couldn't retreat they couldn't retreat
Forma com V-ing
I couldn't be retreating you couldn't be retreating he couldn't be retreating we couldn't be retreating you couldn't be retreating they couldn't be retreating
Perfeito
I couldn't have retreated you couldn't have retreated he couldn't have retreated we couldn't have retreated you couldn't have retreated they couldn't have retreated
Perfeito com V-ing
I couldn't have been retreating you couldn't have been retreating he couldn't have been retreating we couldn't have been retreating you couldn't have been retreating they couldn't have been retreating
Forma interrogativa
Forma simple
could I retreat? could you retreat? could he retreat? could we retreat? could you retreat? could they retreat?
Forma com V-ing
could I be retreating? could you be retreating? could he be retreating? could we be retreating? could you be retreating? could they be retreating?
Perfeito
could I have retreated? could you have retreated? could he have retreated? could we have retreated? could you have retreated? could they have retreated?
Perfeito com V-ing
could I have been retreating? could you have been retreating? could he have been retreating? could we have been retreating? could you have been retreating? could they have been retreating?
Forma interro-Negação
Forma simple
couldn't I retreat? couldn't you retreat? couldn't he retreat? couldn't we retreat? couldn't you retreat? couldn't they retreat?
Forma com V-ing
couldn't I be retreating? couldn't you be retreating? couldn't he be retreating? couldn't we be retreating? couldn't you be retreating? couldn't they be retreating?
Perfeito
couldn't I have retreated? couldn't you have retreated? couldn't he have retreated? couldn't we have retreated? couldn't you have retreated? couldn't they have retreated?
Perfeito com V-ing
couldn't I have been retreating? couldn't you have been retreating? couldn't he have been retreating? couldn't we have been retreating? couldn't you have been retreating? couldn't they have been retreating?