English verb conjugation
MUST AIR-CONDITION

Regular verb: air-condition - air-conditioned - air-conditioned

Affirmation

Simple form	V-ing form
I must air-condition you must air-condition he must air-condition we must air-condition you must air-condition they must air-condition	I must be air-conditioning you must be air-conditioning he must be air-conditioning we must be air-conditioning you must be air-conditioning they must be air-conditioning
Perfect	V-ing perfect
I must have air-conditioned you must have air-conditioned he must have air-conditioned we must have air-conditioned you must have air-conditioned they must have air-conditioned	I must have been air-conditioning you must have been air-conditioning he must have been air-conditioning we must have been air-conditioning you must have been air-conditioning they must have been air-conditioning

Negation

Simple form	V-ing form
I must not air-condition you must not air-condition he must not air-condition we must not air-condition you must not air-condition they must not air-condition	I must not be air-conditioning you must not be air-conditioning he must not be air-conditioning we must not be air-conditioning you must not be air-conditioning they must not be air-conditioning
Perfect	V-ing perfect
I must not have air-conditioned you must not have air-conditioned he must not have air-conditioned we must not have air-conditioned you must not have air-conditioned they must not have air-conditioned	I must not have been air-conditioning you must not have been air-conditioning he must not have been air-conditioning we must not have been air-conditioning you must not have been air-conditioning they must not have been air-conditioning

Interrogative form

Simple form	V-ing form
must I air-condition? must you air-condition? must he air-condition? must we air-condition? must you air-condition? must they air-condition?	must I be air-conditioning? must you be air-conditioning? must he be air-conditioning? must we be air-conditioning? must you be air-conditioning? must they be air-conditioning?
Perfect	V-ing perfect
must I have air-conditioned? must you have air-conditioned? must he have air-conditioned? must we have air-conditioned? must you have air-conditioned? must they have air-conditioned?	must I have been air-conditioning? must you have been air-conditioning? must he have been air-conditioning? must we have been air-conditioning? must you have been air-conditioning? must they have been air-conditioning?

Interro-negative form

Simple form	V-ing form
must I not air-condition? must you not air-condition? must he not air-condition? must we not air-condition? must you not air-condition? must they not air-condition?	must I not be air-conditioning? must you not be air-conditioning? must he not be air-conditioning? must we not be air-conditioning? must you not be air-conditioning? must they not be air-conditioning?
Perfect	V-ing perfect
must I not have air-conditioned? must you not have air-conditioned? must he not have air-conditioned? must we not have air-conditioned? must you not have air-conditioned? must they not have air-conditioned?	must I not have been air-conditioning? must you not have been air-conditioning? must he not have been air-conditioning? must we not have been air-conditioning? must you not have been air-conditioning? must they not have been air-conditioning?