I must aviate you must aviate she must aviate we must aviate you must aviate they must aviate
V-ing form
I must be aviating you must be aviating she must be aviating we must be aviating you must be aviating they must be aviating
Perfect
I must have aviated you must have aviated she must have aviated we must have aviated you must have aviated they must have aviated
V-ing perfect
I must have been aviating you must have been aviating she must have been aviating we must have been aviating you must have been aviating they must have been aviating
Negation
Simple form
I must not aviate you must not aviate she must not aviate we must not aviate you must not aviate they must not aviate
V-ing form
I must not be aviating you must not be aviating she must not be aviating we must not be aviating you must not be aviating they must not be aviating
Perfect
I must not have aviated you must not have aviated she must not have aviated we must not have aviated you must not have aviated they must not have aviated
V-ing perfect
I must not have been aviating you must not have been aviating she must not have been aviating we must not have been aviating you must not have been aviating they must not have been aviating
Interrogative form
Simple form
must I aviate? must you aviate? must she aviate? must we aviate? must you aviate? must they aviate?
V-ing form
must I be aviating? must you be aviating? must she be aviating? must we be aviating? must you be aviating? must they be aviating?
Perfect
must I have aviated? must you have aviated? must she have aviated? must we have aviated? must you have aviated? must they have aviated?
V-ing perfect
must I have been aviating? must you have been aviating? must she have been aviating? must we have been aviating? must you have been aviating? must they have been aviating?
Interro-negative form
Simple form
must I not aviate? must you not aviate? must she not aviate? must we not aviate? must you not aviate? must they not aviate?
V-ing form
must I not be aviating? must you not be aviating? must she not be aviating? must we not be aviating? must you not be aviating? must they not be aviating?
Perfect
must I not have aviated? must you not have aviated? must she not have aviated? must we not have aviated? must you not have aviated? must they not have aviated?
V-ing perfect
must I not have been aviating? must you not have been aviating? must she not have been aviating? must we not have been aviating? must you not have been aviating? must they not have been aviating?