English verb conjugation
MUST SKY

Regular verb: sky - skied - skied

Affirmation

Simple form	V-ing form
I must sky you must sky he must sky we must sky you must sky they must sky	I must be skying you must be skying he must be skying we must be skying you must be skying they must be skying
Perfect	V-ing perfect
I must have skied you must have skied he must have skied we must have skied you must have skied they must have skied	I must have been skying you must have been skying he must have been skying we must have been skying you must have been skying they must have been skying

Negation

Simple form	V-ing form
I must not sky you must not sky he must not sky we must not sky you must not sky they must not sky	I must not be skying you must not be skying he must not be skying we must not be skying you must not be skying they must not be skying
Perfect	V-ing perfect
I must not have skied you must not have skied he must not have skied we must not have skied you must not have skied they must not have skied	I must not have been skying you must not have been skying he must not have been skying we must not have been skying you must not have been skying they must not have been skying

Interrogative form

Simple form	V-ing form
must I sky? must you sky? must he sky? must we sky? must you sky? must they sky?	must I be skying? must you be skying? must he be skying? must we be skying? must you be skying? must they be skying?
Perfect	V-ing perfect
must I have skied? must you have skied? must he have skied? must we have skied? must you have skied? must they have skied?	must I have been skying? must you have been skying? must he have been skying? must we have been skying? must you have been skying? must they have been skying?

Interro-negative form

Simple form	V-ing form
must I not sky? must you not sky? must he not sky? must we not sky? must you not sky? must they not sky?	must I not be skying? must you not be skying? must he not be skying? must we not be skying? must you not be skying? must they not be skying?
Perfect	V-ing perfect
must I not have skied? must you not have skied? must he not have skied? must we not have skied? must you not have skied? must they not have skied?	must I not have been skying? must you not have been skying? must he not have been skying? must we not have been skying? must you not have been skying? must they not have been skying?