English verb conjugation
MUST COMB

Regular verb: comb - combed - combed

Affirmation

Simple form	V-ing form
I must comb you must comb he must comb we must comb you must comb they must comb	I must be combing you must be combing he must be combing we must be combing you must be combing they must be combing
Perfect	V-ing perfect
I must have combed you must have combed he must have combed we must have combed you must have combed they must have combed	I must have been combing you must have been combing he must have been combing we must have been combing you must have been combing they must have been combing

Negation

Simple form	V-ing form
I must not comb you must not comb he must not comb we must not comb you must not comb they must not comb	I must not be combing you must not be combing he must not be combing we must not be combing you must not be combing they must not be combing
Perfect	V-ing perfect
I must not have combed you must not have combed he must not have combed we must not have combed you must not have combed they must not have combed	I must not have been combing you must not have been combing he must not have been combing we must not have been combing you must not have been combing they must not have been combing

Interrogative form

Simple form	V-ing form
must I comb? must you comb? must he comb? must we comb? must you comb? must they comb?	must I be combing? must you be combing? must he be combing? must we be combing? must you be combing? must they be combing?
Perfect	V-ing perfect
must I have combed? must you have combed? must he have combed? must we have combed? must you have combed? must they have combed?	must I have been combing? must you have been combing? must he have been combing? must we have been combing? must you have been combing? must they have been combing?

Interro-negative form

Simple form	V-ing form
must I not comb? must you not comb? must he not comb? must we not comb? must you not comb? must they not comb?	must I not be combing? must you not be combing? must he not be combing? must we not be combing? must you not be combing? must they not be combing?
Perfect	V-ing perfect
must I not have combed? must you not have combed? must he not have combed? must we not have combed? must you not have combed? must they not have combed?	must I not have been combing? must you not have been combing? must he not have been combing? must we not have been combing? must you not have been combing? must they not have been combing?