I can sharpen you can sharpen she can sharpen we can sharpen you can sharpen they can sharpen
Forma com V-ing
I can be sharpening you can be sharpening she can be sharpening we can be sharpening you can be sharpening they can be sharpening
Perfeito
I can have sharpened you can have sharpened she can have sharpened we can have sharpened you can have sharpened they can have sharpened
Perfeito com V-ing
I can have been sharpening you can have been sharpening she can have been sharpening we can have been sharpening you can have been sharpening they can have been sharpening
Negação
Forma simple
I can't sharpen you can't sharpen she can't sharpen we can't sharpen you can't sharpen they can't sharpen
Forma com V-ing
I can't be sharpening you can't be sharpening she can't be sharpening we can't be sharpening you can't be sharpening they can't be sharpening
Perfeito
I can't have sharpened you can't have sharpened she can't have sharpened we can't have sharpened you can't have sharpened they can't have sharpened
Perfeito com V-ing
I can't have been sharpening you can't have been sharpening she 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
can I sharpen? can you sharpen? can she sharpen? can we sharpen? can you sharpen? can they sharpen?
Forma com V-ing
can I be sharpening? can you be sharpening? can she be sharpening? can we be sharpening? can you be sharpening? can they be sharpening?
Perfeito
can I have sharpened? can you have sharpened? can she have sharpened? can we have sharpened? can you have sharpened? can they have sharpened?
Perfeito com V-ing
can I have been sharpening? can you have been sharpening? can she have been sharpening? can we have been sharpening? can you have been sharpening? can they have been sharpening?
Forma interro-Negação
Forma simple
can't I sharpen? can't you sharpen? can't she sharpen? can't we sharpen? can't you sharpen? can't they sharpen?
Forma com V-ing
can't I be sharpening? can't you be sharpening? can't she be sharpening? can't we be sharpening? can't you be sharpening? can't they be sharpening?
Perfeito
can't I have sharpened? can't you have sharpened? can't she have sharpened? can't we have sharpened? can't you have sharpened? can't they have sharpened?
Perfeito com V-ing
can't I have been sharpening? can't you have been sharpening? can't she have been sharpening? can't we have been sharpening? can't you have been sharpening? can't they have been sharpening?