I must suck you must suck she must suck we must suck you must suck they must suck
Forme en V-ing
I must be sucking you must be sucking she must be sucking we must be sucking you must be sucking they must be sucking
Perfect
I must have sucked you must have sucked she must have sucked we must have sucked you must have sucked they must have sucked
Perfect en V-ing
I must have been sucking you must have been sucking she must have been sucking we must have been sucking you must have been sucking they must have been sucking
Négation
Forme simple
I mustn't suck you mustn't suck she mustn't suck we mustn't suck you mustn't suck they mustn't suck
Forme en V-ing
I mustn't be sucking you mustn't be sucking she mustn't be sucking we mustn't be sucking you mustn't be sucking they mustn't be sucking
Perfect
I mustn't have sucked you mustn't have sucked she mustn't have sucked we mustn't have sucked you mustn't have sucked they mustn't have sucked
Perfect en V-ing
I mustn't have been sucking you mustn't have been sucking she mustn't have been sucking we mustn't have been sucking you mustn't have been sucking they mustn't have been sucking
Forme interrogative
Forme simple
must I suck? must you suck? must she suck? must we suck? must you suck? must they suck?
Forme en V-ing
must I be sucking? must you be sucking? must she be sucking? must we be sucking? must you be sucking? must they be sucking?
Perfect
must I have sucked? must you have sucked? must she have sucked? must we have sucked? must you have sucked? must they have sucked?
Perfect en V-ing
must I have been sucking? must you have been sucking? must she have been sucking? must we have been sucking? must you have been sucking? must they have been sucking?
Forme interro-négative
Forme simple
mustn't I suck? mustn't you suck? mustn't she suck? mustn't we suck? mustn't you suck? mustn't they suck?
Forme en V-ing
mustn't I be sucking? mustn't you be sucking? mustn't she be sucking? mustn't we be sucking? mustn't you be sucking? mustn't they be sucking?
Perfect
mustn't I have sucked? mustn't you have sucked? mustn't she have sucked? mustn't we have sucked? mustn't you have sucked? mustn't they have sucked?
Perfect en V-ing
mustn't I have been sucking? mustn't you have been sucking? mustn't she have been sucking? mustn't we have been sucking? mustn't you have been sucking? mustn't they have been sucking?