Conjugación del verbo inglés
CAN SHARPEN

Verbo regular: sharpen - sharpened - sharpened

Afirmación

Forma simple	Forma con V-ing
I can sharpen you can sharpen he can sharpen we can sharpen you can sharpen they can sharpen	I can be sharpening you can be sharpening he can be sharpening we can be sharpening you can be sharpening they can be sharpening
Perfecto	Perfecto con V-ing
I can have sharpened you can have sharpened he can have sharpened we can have sharpened you can have sharpened they can have sharpened	I can have been sharpening you can have been sharpening he can have been sharpening we can have been sharpening you can have been sharpening they can have been sharpening

Negación

Forma simple	Forma con V-ing
I can't sharpen you can't sharpen he can't sharpen we can't sharpen you can't sharpen they can't sharpen	I can't be sharpening you can't be sharpening he can't be sharpening we can't be sharpening you can't be sharpening they can't be sharpening
Perfecto	Perfecto con V-ing
I can't have sharpened you can't have sharpened he can't have sharpened we can't have sharpened you can't have sharpened they can't have sharpened	I can't have been sharpening you can't have been sharpening he can't have been sharpening we can't have been sharpening you can't have been sharpening they can't have been sharpening

Forma interrogativa

Forma simple	Forma con V-ing
can I sharpen? can you sharpen? can he sharpen? can we sharpen? can you sharpen? can they sharpen?	can I be sharpening? can you be sharpening? can he be sharpening? can we be sharpening? can you be sharpening? can they be sharpening?
Perfecto	Perfecto con V-ing
can I have sharpened? can you have sharpened? can he have sharpened? can we have sharpened? can you have sharpened? can they have sharpened?	can I have been sharpening? can you have been sharpening? can he have been sharpening? can we have been sharpening? can you have been sharpening? can they have been sharpening?

Forma interro-negativa

Forma simple	Forma con V-ing
can't I sharpen? can't you sharpen? can't he sharpen? can't we sharpen? can't you sharpen? can't they sharpen?	can't I be sharpening? can't you be sharpening? can't he be sharpening? can't we be sharpening? can't you be sharpening? can't they be sharpening?
Perfecto	Perfecto con V-ing
can't I have sharpened? can't you have sharpened? can't he have sharpened? can't we have sharpened? can't you have sharpened? can't they have sharpened?	can't I have been sharpening? can't you have been sharpening? can't he have been sharpening? can't we have been sharpening? can't you have been sharpening? can't they have been sharpening?