I could echo you could echo she could echo we could echo you could echo they could echo
Forme en V-ing
I could be echoing you could be echoing she could be echoing we could be echoing you could be echoing they could be echoing
Perfect
I could have echoed you could have echoed she could have echoed we could have echoed you could have echoed they could have echoed
Perfect en V-ing
I could have been echoing you could have been echoing she could have been echoing we could have been echoing you could have been echoing they could have been echoing
Négation
Forme simple
I couldn't echo you couldn't echo she couldn't echo we couldn't echo you couldn't echo they couldn't echo
Forme en V-ing
I couldn't be echoing you couldn't be echoing she couldn't be echoing we couldn't be echoing you couldn't be echoing they couldn't be echoing
Perfect
I couldn't have echoed you couldn't have echoed she couldn't have echoed we couldn't have echoed you couldn't have echoed they couldn't have echoed
Perfect en V-ing
I couldn't have been echoing you couldn't have been echoing she couldn't have been echoing we couldn't have been echoing you couldn't have been echoing they couldn't have been echoing
Forme interrogative
Forme simple
could I echo? could you echo? could she echo? could we echo? could you echo? could they echo?
Forme en V-ing
could I be echoing? could you be echoing? could she be echoing? could we be echoing? could you be echoing? could they be echoing?
Perfect
could I have echoed? could you have echoed? could she have echoed? could we have echoed? could you have echoed? could they have echoed?
Perfect en V-ing
could I have been echoing? could you have been echoing? could she have been echoing? could we have been echoing? could you have been echoing? could they have been echoing?
Forme interro-négative
Forme simple
couldn't I echo? couldn't you echo? couldn't she echo? couldn't we echo? couldn't you echo? couldn't they echo?
Forme en V-ing
couldn't I be echoing? couldn't you be echoing? couldn't she be echoing? couldn't we be echoing? couldn't you be echoing? couldn't they be echoing?
Perfect
couldn't I have echoed? couldn't you have echoed? couldn't she have echoed? couldn't we have echoed? couldn't you have echoed? couldn't they have echoed?
Perfect en V-ing
couldn't I have been echoing? couldn't you have been echoing? couldn't she have been echoing? couldn't we have been echoing? couldn't you have been echoing? couldn't they have been echoing?