English verb conjugation
MUST CRISPEN

Regular verb: crispen - crispened - crispened

Affirmation

Simple form	V-ing form
I must crispen you must crispen he must crispen we must crispen you must crispen they must crispen	I must be crispening you must be crispening he must be crispening we must be crispening you must be crispening they must be crispening
Perfect	V-ing perfect
I must have crispened you must have crispened he must have crispened we must have crispened you must have crispened they must have crispened	I must have been crispening you must have been crispening he must have been crispening we must have been crispening you must have been crispening they must have been crispening

Negation

Simple form	V-ing form
I must not crispen you must not crispen he must not crispen we must not crispen you must not crispen they must not crispen	I must not be crispening you must not be crispening he must not be crispening we must not be crispening you must not be crispening they must not be crispening
Perfect	V-ing perfect
I must not have crispened you must not have crispened he must not have crispened we must not have crispened you must not have crispened they must not have crispened	I must not have been crispening you must not have been crispening he must not have been crispening we must not have been crispening you must not have been crispening they must not have been crispening

Interrogative form

Simple form	V-ing form
must I crispen? must you crispen? must he crispen? must we crispen? must you crispen? must they crispen?	must I be crispening? must you be crispening? must he be crispening? must we be crispening? must you be crispening? must they be crispening?
Perfect	V-ing perfect
must I have crispened? must you have crispened? must he have crispened? must we have crispened? must you have crispened? must they have crispened?	must I have been crispening? must you have been crispening? must he have been crispening? must we have been crispening? must you have been crispening? must they have been crispening?

Interro-negative form

Simple form	V-ing form
must I not crispen? must you not crispen? must he not crispen? must we not crispen? must you not crispen? must they not crispen?	must I not be crispening? must you not be crispening? must he not be crispening? must we not be crispening? must you not be crispening? must they not be crispening?
Perfect	V-ing perfect
must I not have crispened? must you not have crispened? must he not have crispened? must we not have crispened? must you not have crispened? must they not have crispened?	must I not have been crispening? must you not have been crispening? must he not have been crispening? must we not have been crispening? must you not have been crispening? must they not have been crispening?