I could resharpen you could resharpen he could resharpen we could resharpen you could resharpen they could resharpen
V-ing form
I could be resharpening you could be resharpening he could be resharpening we could be resharpening you could be resharpening they could be resharpening
Perfect
I could have resharpened you could have resharpened he could have resharpened we could have resharpened you could have resharpened they could have resharpened
V-ing perfect
I could have been resharpening you could have been resharpening he could have been resharpening we could have been resharpening you could have been resharpening they could have been resharpening
Negation
Simple form
I couldn't resharpen you couldn't resharpen he couldn't resharpen we couldn't resharpen you couldn't resharpen they couldn't resharpen
V-ing form
I couldn't be resharpening you couldn't be resharpening he couldn't be resharpening we couldn't be resharpening you couldn't be resharpening they couldn't be resharpening
Perfect
I couldn't have resharpened you couldn't have resharpened he couldn't have resharpened we couldn't have resharpened you couldn't have resharpened they couldn't have resharpened
V-ing perfect
I couldn't have been resharpening you couldn't have been resharpening he couldn't have been resharpening we couldn't have been resharpening you couldn't have been resharpening they couldn't have been resharpening
Interrogative form
Simple form
could I resharpen? could you resharpen? could he resharpen? could we resharpen? could you resharpen? could they resharpen?
V-ing form
could I be resharpening? could you be resharpening? could he be resharpening? could we be resharpening? could you be resharpening? could they be resharpening?
Perfect
could I have resharpened? could you have resharpened? could he have resharpened? could we have resharpened? could you have resharpened? could they have resharpened?
V-ing perfect
could I have been resharpening? could you have been resharpening? could he have been resharpening? could we have been resharpening? could you have been resharpening? could they have been resharpening?
Interro-negative form
Simple form
couldn't I resharpen? couldn't you resharpen? couldn't he resharpen? couldn't we resharpen? couldn't you resharpen? couldn't they resharpen?
V-ing form
couldn't I be resharpening? couldn't you be resharpening? couldn't he be resharpening? couldn't we be resharpening? couldn't you be resharpening? couldn't they be resharpening?
Perfect
couldn't I have resharpened? couldn't you have resharpened? couldn't he have resharpened? couldn't we have resharpened? couldn't you have resharpened? couldn't they have resharpened?
V-ing perfect
couldn't I have been resharpening? couldn't you have been resharpening? couldn't he have been resharpening? couldn't we have been resharpening? couldn't you have been resharpening? couldn't they have been resharpening?