I must companion you must companion she must companion we must companion you must companion they must companion
V-ing form
I must be companioning you must be companioning she must be companioning we must be companioning you must be companioning they must be companioning
Perfect
I must have companioned you must have companioned she must have companioned we must have companioned you must have companioned they must have companioned
V-ing perfect
I must have been companioning you must have been companioning she must have been companioning we must have been companioning you must have been companioning they must have been companioning
Negation
Simple form
I must not companion you must not companion she must not companion we must not companion you must not companion they must not companion
V-ing form
I must not be companioning you must not be companioning she must not be companioning we must not be companioning you must not be companioning they must not be companioning
Perfect
I must not have companioned you must not have companioned she must not have companioned we must not have companioned you must not have companioned they must not have companioned
V-ing perfect
I must not have been companioning you must not have been companioning she must not have been companioning we must not have been companioning you must not have been companioning they must not have been companioning
Interrogative form
Simple form
must I companion? must you companion? must she companion? must we companion? must you companion? must they companion?
V-ing form
must I be companioning? must you be companioning? must she be companioning? must we be companioning? must you be companioning? must they be companioning?
Perfect
must I have companioned? must you have companioned? must she have companioned? must we have companioned? must you have companioned? must they have companioned?
V-ing perfect
must I have been companioning? must you have been companioning? must she have been companioning? must we have been companioning? must you have been companioning? must they have been companioning?
Interro-negative form
Simple form
must I not companion? must you not companion? must she not companion? must we not companion? must you not companion? must they not companion?
V-ing form
must I not be companioning? must you not be companioning? must she not be companioning? must we not be companioning? must you not be companioning? must they not be companioning?
Perfect
must I not have companioned? must you not have companioned? must she not have companioned? must we not have companioned? must you not have companioned? must they not have companioned?
V-ing perfect
must I not have been companioning? must you not have been companioning? must she not have been companioning? must we not have been companioning? must you not have been companioning? must they not have been companioning?