Verbo regular: strengthen - strengthened - strengthened
Afirmación
Forma simple
I can strengthen you can strengthen he can strengthen we can strengthen you can strengthen they can strengthen
Forma con V-ing
I can be strengthening you can be strengthening he can be strengthening we can be strengthening you can be strengthening they can be strengthening
Perfecto
I can have strengthened you can have strengthened he can have strengthened we can have strengthened you can have strengthened they can have strengthened
Perfecto con V-ing
I can have been strengthening you can have been strengthening he can have been strengthening we can have been strengthening you can have been strengthening they can have been strengthening
Negación
Forma simple
I cannot strengthen you cannot strengthen he cannot strengthen we cannot strengthen you cannot strengthen they cannot strengthen
Forma con V-ing
I cannot be strengthening you cannot be strengthening he cannot be strengthening we cannot be strengthening you cannot be strengthening they cannot be strengthening
Perfecto
I cannot have strengthened you cannot have strengthened he cannot have strengthened we cannot have strengthened you cannot have strengthened they cannot have strengthened
Perfecto con V-ing
I cannot have been strengthening you cannot have been strengthening he cannot have been strengthening we cannot have been strengthening you cannot have been strengthening they cannot have been strengthening
Forma interrogativa
Forma simple
can I strengthen? can you strengthen? can he strengthen? can we strengthen? can you strengthen? can they strengthen?
Forma con V-ing
can I be strengthening? can you be strengthening? can he be strengthening? can we be strengthening? can you be strengthening? can they be strengthening?
Perfecto
can I have strengthened? can you have strengthened? can he have strengthened? can we have strengthened? can you have strengthened? can they have strengthened?
Perfecto con V-ing
can I have been strengthening? can you have been strengthening? can he have been strengthening? can we have been strengthening? can you have been strengthening? can they have been strengthening?
Forma interro-negativa
Forma simple
can I not strengthen? can you not strengthen? can he not strengthen? can we not strengthen? can you not strengthen? can they not strengthen?
Forma con V-ing
can I not be strengthening? can you not be strengthening? can he not be strengthening? can we not be strengthening? can you not be strengthening? can they not be strengthening?
Perfecto
can I not have strengthened? can you not have strengthened? can he not have strengthened? can we not have strengthened? can you not have strengthened? can they not have strengthened?
Perfecto con V-ing
can I not have been strengthening? can you not have been strengthening? can he not have been strengthening? can we not have been strengthening? can you not have been strengthening? can they not have been strengthening?