English verb conjugation
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Regular verb: circumscribe - circumscribed - circumscribed

Affirmation

Simple form	V-ing form
I must circumscribe you must circumscribe he must circumscribe we must circumscribe you must circumscribe they must circumscribe	I must be circumscribing you must be circumscribing he must be circumscribing we must be circumscribing you must be circumscribing they must be circumscribing
Perfect	V-ing perfect
I must have circumscribed you must have circumscribed he must have circumscribed we must have circumscribed you must have circumscribed they must have circumscribed	I must have been circumscribing you must have been circumscribing he must have been circumscribing we must have been circumscribing you must have been circumscribing they must have been circumscribing

Negation

Simple form	V-ing form
I must not circumscribe you must not circumscribe he must not circumscribe we must not circumscribe you must not circumscribe they must not circumscribe	I must not be circumscribing you must not be circumscribing he must not be circumscribing we must not be circumscribing you must not be circumscribing they must not be circumscribing
Perfect	V-ing perfect
I must not have circumscribed you must not have circumscribed he must not have circumscribed we must not have circumscribed you must not have circumscribed they must not have circumscribed	I must not have been circumscribing you must not have been circumscribing he must not have been circumscribing we must not have been circumscribing you must not have been circumscribing they must not have been circumscribing

Interrogative form

Simple form	V-ing form
must I circumscribe? must you circumscribe? must he circumscribe? must we circumscribe? must you circumscribe? must they circumscribe?	must I be circumscribing? must you be circumscribing? must he be circumscribing? must we be circumscribing? must you be circumscribing? must they be circumscribing?
Perfect	V-ing perfect
must I have circumscribed? must you have circumscribed? must he have circumscribed? must we have circumscribed? must you have circumscribed? must they have circumscribed?	must I have been circumscribing? must you have been circumscribing? must he have been circumscribing? must we have been circumscribing? must you have been circumscribing? must they have been circumscribing?

Interro-negative form

Simple form	V-ing form
must I not circumscribe? must you not circumscribe? must he not circumscribe? must we not circumscribe? must you not circumscribe? must they not circumscribe?	must I not be circumscribing? must you not be circumscribing? must he not be circumscribing? must we not be circumscribing? must you not be circumscribing? must they not be circumscribing?
Perfect	V-ing perfect
must I not have circumscribed? must you not have circumscribed? must he not have circumscribed? must we not have circumscribed? must you not have circumscribed? must they not have circumscribed?	must I not have been circumscribing? must you not have been circumscribing? must he not have been circumscribing? must we not have been circumscribing? must you not have been circumscribing? must they not have been circumscribing?