Regular verb: sharpen - sharpened - sharpened
Simple form | V-ing form |
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 |
Perfect | V-ing perfect |
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 |
Simple form | V-ing form |
I cannot sharpen you cannot sharpen he cannot sharpen we cannot sharpen you cannot sharpen they cannot sharpen | I cannot be sharpening you cannot be sharpening he cannot be sharpening we cannot be sharpening you cannot be sharpening they cannot be sharpening |
Perfect | V-ing perfect |
I cannot have sharpened you cannot have sharpened he cannot have sharpened we cannot have sharpened you cannot have sharpened they cannot have sharpened | I cannot have been sharpening you cannot have been sharpening he cannot have been sharpening we cannot have been sharpening you cannot have been sharpening they cannot have been sharpening |
Simple form | V-ing form |
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? |
Perfect | V-ing perfect |
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? |
Simple form | V-ing form |
can I not sharpen? can you not sharpen? can he not sharpen? can we not sharpen? can you not sharpen? can they not sharpen? | can I not be sharpening? can you not be sharpening? can he not be sharpening? can we not be sharpening? can you not be sharpening? can they not be sharpening? |
Perfect | V-ing perfect |
can I not have sharpened? can you not have sharpened? can he not have sharpened? can we not have sharpened? can you not have sharpened? can they not have sharpened? | can I not have been sharpening? can you not have been sharpening? can he not have been sharpening? can we not have been sharpening? can you not have been sharpening? can they not have been sharpening? |