English verb conjugation
CAN PRESHARPEN

Regular verb: presharpen - presharpened - presharpened

Affirmation

Simple form	V-ing form
I can presharpen you can presharpen he can presharpen we can presharpen you can presharpen they can presharpen	I can be presharpening you can be presharpening he can be presharpening we can be presharpening you can be presharpening they can be presharpening
Perfect	V-ing perfect
I can have presharpened you can have presharpened he can have presharpened we can have presharpened you can have presharpened they can have presharpened	I can have been presharpening you can have been presharpening he can have been presharpening we can have been presharpening you can have been presharpening they can have been presharpening

Negation

Simple form	V-ing form
I can't presharpen you can't presharpen he can't presharpen we can't presharpen you can't presharpen they can't presharpen	I can't be presharpening you can't be presharpening he can't be presharpening we can't be presharpening you can't be presharpening they can't be presharpening
Perfect	V-ing perfect
I can't have presharpened you can't have presharpened he can't have presharpened we can't have presharpened you can't have presharpened they can't have presharpened	I can't have been presharpening you can't have been presharpening he can't have been presharpening we can't have been presharpening you can't have been presharpening they can't have been presharpening

Interrogative form

Simple form	V-ing form
can I presharpen? can you presharpen? can he presharpen? can we presharpen? can you presharpen? can they presharpen?	can I be presharpening? can you be presharpening? can he be presharpening? can we be presharpening? can you be presharpening? can they be presharpening?
Perfect	V-ing perfect
can I have presharpened? can you have presharpened? can he have presharpened? can we have presharpened? can you have presharpened? can they have presharpened?	can I have been presharpening? can you have been presharpening? can he have been presharpening? can we have been presharpening? can you have been presharpening? can they have been presharpening?

Interro-negative form

Simple form	V-ing form
can't I presharpen? can't you presharpen? can't he presharpen? can't we presharpen? can't you presharpen? can't they presharpen?	can't I be presharpening? can't you be presharpening? can't he be presharpening? can't we be presharpening? can't you be presharpening? can't they be presharpening?
Perfect	V-ing perfect
can't I have presharpened? can't you have presharpened? can't he have presharpened? can't we have presharpened? can't you have presharpened? can't they have presharpened?	can't I have been presharpening? can't you have been presharpening? can't he have been presharpening? can't we have been presharpening? can't you have been presharpening? can't they have been presharpening?