Verbo regular: strengthen - strengthened - strengthened
Afirmação
Forma simple
I could strengthen you could strengthen she could strengthen we could strengthen you could strengthen they could strengthen
Forma com V-ing
I could be strengthening you could be strengthening she could be strengthening we could be strengthening you could be strengthening they could be strengthening
Perfeito
I could have strengthened you could have strengthened she could have strengthened we could have strengthened you could have strengthened they could have strengthened
Perfeito com V-ing
I could have been strengthening you could have been strengthening she could have been strengthening we could have been strengthening you could have been strengthening they could have been strengthening
Negação
Forma simple
I could not strengthen you could not strengthen she could not strengthen we could not strengthen you could not strengthen they could not strengthen
Forma com V-ing
I could not be strengthening you could not be strengthening she could not be strengthening we could not be strengthening you could not be strengthening they could not be strengthening
Perfeito
I could not have strengthened you could not have strengthened she could not have strengthened we could not have strengthened you could not have strengthened they could not have strengthened
Perfeito com V-ing
I could not have been strengthening you could not have been strengthening she could not have been strengthening we could not have been strengthening you could not have been strengthening they could not have been strengthening
Forma interrogativa
Forma simple
could I strengthen? could you strengthen? could she strengthen? could we strengthen? could you strengthen? could they strengthen?
Forma com V-ing
could I be strengthening? could you be strengthening? could she be strengthening? could we be strengthening? could you be strengthening? could they be strengthening?
Perfeito
could I have strengthened? could you have strengthened? could she have strengthened? could we have strengthened? could you have strengthened? could they have strengthened?
Perfeito com V-ing
could I have been strengthening? could you have been strengthening? could she have been strengthening? could we have been strengthening? could you have been strengthening? could they have been strengthening?
Forma interro-Negação
Forma simple
could I not strengthen? could you not strengthen? could she not strengthen? could we not strengthen? could you not strengthen? could they not strengthen?
Forma com V-ing
could I not be strengthening? could you not be strengthening? could she not be strengthening? could we not be strengthening? could you not be strengthening? could they not be strengthening?
Perfeito
could I not have strengthened? could you not have strengthened? could she not have strengthened? could we not have strengthened? could you not have strengthened? could they not have strengthened?
Perfeito com V-ing
could I not have been strengthening? could you not have been strengthening? could she not have been strengthening? could we not have been strengthening? could you not have been strengthening? could they not have been strengthening?