Cuidado, este verbo pode não existir, a conjugação é dada como exemplo.
Afirmação
Forma simple
I must go down you must go down she must go down we must go down you must go down they must go down
Forma com V-ing
I must be go downing you must be go downing she must be go downing we must be go downing you must be go downing they must be go downing
Perfeito
I must have go downed you must have go downed she must have go downed we must have go downed you must have go downed they must have go downed
Perfeito com V-ing
I must have been go downing you must have been go downing she must have been go downing we must have been go downing you must have been go downing they must have been go downing
Negação
Forma simple
I must not go down you must not go down she must not go down we must not go down you must not go down they must not go down
Forma com V-ing
I must not be go downing you must not be go downing she must not be go downing we must not be go downing you must not be go downing they must not be go downing
Perfeito
I must not have go downed you must not have go downed she must not have go downed we must not have go downed you must not have go downed they must not have go downed
Perfeito com V-ing
I must not have been go downing you must not have been go downing she must not have been go downing we must not have been go downing you must not have been go downing they must not have been go downing
Forma interrogativa
Forma simple
must I go down? must you go down? must she go down? must we go down? must you go down? must they go down?
Forma com V-ing
must I be go downing? must you be go downing? must she be go downing? must we be go downing? must you be go downing? must they be go downing?
Perfeito
must I have go downed? must you have go downed? must she have go downed? must we have go downed? must you have go downed? must they have go downed?
Perfeito com V-ing
must I have been go downing? must you have been go downing? must she have been go downing? must we have been go downing? must you have been go downing? must they have been go downing?
Forma interro-Negação
Forma simple
must I not go down? must you not go down? must she not go down? must we not go down? must you not go down? must they not go down?
Forma com V-ing
must I not be go downing? must you not be go downing? must she not be go downing? must we not be go downing? must you not be go downing? must they not be go downing?
Perfeito
must I not have go downed? must you not have go downed? must she not have go downed? must we not have go downed? must you not have go downed? must they not have go downed?
Perfeito com V-ing
must I not have been go downing? must you not have been go downing? must she not have been go downing? must we not have been go downing? must you not have been go downing? must they not have been go downing?