English verb conjugation
MUST BOB

Regular verb: bob - bobbed - bobbed

Affirmation

Simple form	V-ing form
I must bob you must bob he must bob we must bob you must bob they must bob	I must be bobbing you must be bobbing he must be bobbing we must be bobbing you must be bobbing they must be bobbing
Perfect	V-ing perfect
I must have bobbed you must have bobbed he must have bobbed we must have bobbed you must have bobbed they must have bobbed	I must have been bobbing you must have been bobbing he must have been bobbing we must have been bobbing you must have been bobbing they must have been bobbing

Negation

Simple form	V-ing form
I must not bob you must not bob he must not bob we must not bob you must not bob they must not bob	I must not be bobbing you must not be bobbing he must not be bobbing we must not be bobbing you must not be bobbing they must not be bobbing
Perfect	V-ing perfect
I must not have bobbed you must not have bobbed he must not have bobbed we must not have bobbed you must not have bobbed they must not have bobbed	I must not have been bobbing you must not have been bobbing he must not have been bobbing we must not have been bobbing you must not have been bobbing they must not have been bobbing

Interrogative form

Simple form	V-ing form
must I bob? must you bob? must he bob? must we bob? must you bob? must they bob?	must I be bobbing? must you be bobbing? must he be bobbing? must we be bobbing? must you be bobbing? must they be bobbing?
Perfect	V-ing perfect
must I have bobbed? must you have bobbed? must he have bobbed? must we have bobbed? must you have bobbed? must they have bobbed?	must I have been bobbing? must you have been bobbing? must he have been bobbing? must we have been bobbing? must you have been bobbing? must they have been bobbing?

Interro-negative form

Simple form	V-ing form
must I not bob? must you not bob? must he not bob? must we not bob? must you not bob? must they not bob?	must I not be bobbing? must you not be bobbing? must he not be bobbing? must we not be bobbing? must you not be bobbing? must they not be bobbing?
Perfect	V-ing perfect
must I not have bobbed? must you not have bobbed? must he not have bobbed? must we not have bobbed? must you not have bobbed? must they not have bobbed?	must I not have been bobbing? must you not have been bobbing? must he not have been bobbing? must we not have been bobbing? must you not have been bobbing? must they not have been bobbing?