Conjugación del verbo inglés
CAN STRENGTHEN

Verbo regular: strengthen - strengthened - strengthened

Afirmación

Forma simple	Forma con V-ing
I can strengthen you can strengthen he can strengthen we can strengthen you can strengthen they can strengthen	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	Perfecto con V-ing
I can have strengthened you can have strengthened he can have strengthened we can have strengthened you can have strengthened they can have strengthened	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	Forma con V-ing
I cannot strengthen you cannot strengthen he cannot strengthen we cannot strengthen you cannot strengthen they cannot strengthen	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	Perfecto con V-ing
I cannot have strengthened you cannot have strengthened he cannot have strengthened we cannot have strengthened you cannot have strengthened they cannot have strengthened	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	Forma con V-ing
can I strengthen? can you strengthen? can he strengthen? can we strengthen? can you strengthen? can they strengthen?	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	Perfecto con V-ing
can I have strengthened? can you have strengthened? can he have strengthened? can we have strengthened? can you have strengthened? can they have strengthened?	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	Forma con V-ing
can I not strengthen? can you not strengthen? can he not strengthen? can we not strengthen? can you not strengthen? can they not strengthen?	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	Perfecto con V-ing
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?	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?