I must vary you must vary she must vary we must vary you must vary they must vary
Forma com V-ing
I must be varying you must be varying she must be varying we must be varying you must be varying they must be varying
Perfeito
I must have varied you must have varied she must have varied we must have varied you must have varied they must have varied
Perfeito com V-ing
I must have been varying you must have been varying she must have been varying we must have been varying you must have been varying they must have been varying
Negação
Forma simple
I must not vary you must not vary she must not vary we must not vary you must not vary they must not vary
Forma com V-ing
I must not be varying you must not be varying she must not be varying we must not be varying you must not be varying they must not be varying
Perfeito
I must not have varied you must not have varied she must not have varied we must not have varied you must not have varied they must not have varied
Perfeito com V-ing
I must not have been varying you must not have been varying she must not have been varying we must not have been varying you must not have been varying they must not have been varying
Forma interrogativa
Forma simple
must I vary? must you vary? must she vary? must we vary? must you vary? must they vary?
Forma com V-ing
must I be varying? must you be varying? must she be varying? must we be varying? must you be varying? must they be varying?
Perfeito
must I have varied? must you have varied? must she have varied? must we have varied? must you have varied? must they have varied?
Perfeito com V-ing
must I have been varying? must you have been varying? must she have been varying? must we have been varying? must you have been varying? must they have been varying?
Forma interro-Negação
Forma simple
must I not vary? must you not vary? must she not vary? must we not vary? must you not vary? must they not vary?
Forma com V-ing
must I not be varying? must you not be varying? must she not be varying? must we not be varying? must you not be varying? must they not be varying?
Perfeito
must I not have varied? must you not have varied? must she not have varied? must we not have varied? must you not have varied? must they not have varied?
Perfeito com V-ing
must I not have been varying? must you not have been varying? must she not have been varying? must we not have been varying? must you not have been varying? must they not have been varying?