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