English verb conjugation
MUST PRESHARPEN

Regular verb: presharpen - presharpened - presharpened

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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