I must steep you must steep he must steep we must steep you must steep they must steep
Forme en V-ing
I must be steeping you must be steeping he must be steeping we must be steeping you must be steeping they must be steeping
Perfect
I must have steeped you must have steeped he must have steeped we must have steeped you must have steeped they must have steeped
Perfect en V-ing
I must have been steeping you must have been steeping he must have been steeping we must have been steeping you must have been steeping they must have been steeping
Négation
Forme simple
I mustn't steep you mustn't steep he mustn't steep we mustn't steep you mustn't steep they mustn't steep
Forme en V-ing
I mustn't be steeping you mustn't be steeping he mustn't be steeping we mustn't be steeping you mustn't be steeping they mustn't be steeping
Perfect
I mustn't have steeped you mustn't have steeped he mustn't have steeped we mustn't have steeped you mustn't have steeped they mustn't have steeped
Perfect en V-ing
I mustn't have been steeping you mustn't have been steeping he mustn't have been steeping we mustn't have been steeping you mustn't have been steeping they mustn't have been steeping
Forme interrogative
Forme simple
must I steep? must you steep? must he steep? must we steep? must you steep? must they steep?
Forme en V-ing
must I be steeping? must you be steeping? must he be steeping? must we be steeping? must you be steeping? must they be steeping?
Perfect
must I have steeped? must you have steeped? must he have steeped? must we have steeped? must you have steeped? must they have steeped?
Perfect en V-ing
must I have been steeping? must you have been steeping? must he have been steeping? must we have been steeping? must you have been steeping? must they have been steeping?
Forme interro-négative
Forme simple
mustn't I steep? mustn't you steep? mustn't he steep? mustn't we steep? mustn't you steep? mustn't they steep?
Forme en V-ing
mustn't I be steeping? mustn't you be steeping? mustn't he be steeping? mustn't we be steeping? mustn't you be steeping? mustn't they be steeping?
Perfect
mustn't I have steeped? mustn't you have steeped? mustn't he have steeped? mustn't we have steeped? mustn't you have steeped? mustn't they have steeped?
Perfect en V-ing
mustn't I have been steeping? mustn't you have been steeping? mustn't he have been steeping? mustn't we have been steeping? mustn't you have been steeping? mustn't they have been steeping?