English verb conjugation
MUST GROK

Regular verb: grok - groked - groked

Affirmation

Simple form	V-ing form
I must grok you must grok he must grok we must grok you must grok they must grok	I must be groking you must be groking he must be groking we must be groking you must be groking they must be groking
Perfect	V-ing perfect
I must have groked you must have groked he must have groked we must have groked you must have groked they must have groked	I must have been groking you must have been groking he must have been groking we must have been groking you must have been groking they must have been groking

Negation

Simple form	V-ing form
I must not grok you must not grok he must not grok we must not grok you must not grok they must not grok	I must not be groking you must not be groking he must not be groking we must not be groking you must not be groking they must not be groking
Perfect	V-ing perfect
I must not have groked you must not have groked he must not have groked we must not have groked you must not have groked they must not have groked	I must not have been groking you must not have been groking he must not have been groking we must not have been groking you must not have been groking they must not have been groking

Interrogative form

Simple form	V-ing form
must I grok? must you grok? must he grok? must we grok? must you grok? must they grok?	must I be groking? must you be groking? must he be groking? must we be groking? must you be groking? must they be groking?
Perfect	V-ing perfect
must I have groked? must you have groked? must he have groked? must we have groked? must you have groked? must they have groked?	must I have been groking? must you have been groking? must he have been groking? must we have been groking? must you have been groking? must they have been groking?

Interro-negative form

Simple form	V-ing form
must I not grok? must you not grok? must he not grok? must we not grok? must you not grok? must they not grok?	must I not be groking? must you not be groking? must he not be groking? must we not be groking? must you not be groking? must they not be groking?
Perfect	V-ing perfect
must I not have groked? must you not have groked? must he not have groked? must we not have groked? must you not have groked? must they not have groked?	must I not have been groking? must you not have been groking? must he not have been groking? must we not have been groking? must you not have been groking? must they not have been groking?