Attention, ce verbe peut ne pas exister, la conjugaison est donnée à titre d'exemple.
Affirmation
Forme simple
I must think back you must think back he must think back we must think back you must think back they must think back
Forme en V-ing
I must be think backing you must be think backing he must be think backing we must be think backing you must be think backing they must be think backing
Perfect
I must have think backed you must have think backed he must have think backed we must have think backed you must have think backed they must have think backed
Perfect en V-ing
I must have been think backing you must have been think backing he must have been think backing we must have been think backing you must have been think backing they must have been think backing
Négation
Forme simple
I mustn't think back you mustn't think back he mustn't think back we mustn't think back you mustn't think back they mustn't think back
Forme en V-ing
I mustn't be think backing you mustn't be think backing he mustn't be think backing we mustn't be think backing you mustn't be think backing they mustn't be think backing
Perfect
I mustn't have think backed you mustn't have think backed he mustn't have think backed we mustn't have think backed you mustn't have think backed they mustn't have think backed
Perfect en V-ing
I mustn't have been think backing you mustn't have been think backing he mustn't have been think backing we mustn't have been think backing you mustn't have been think backing they mustn't have been think backing
Forme interrogative
Forme simple
must I think back? must you think back? must he think back? must we think back? must you think back? must they think back?
Forme en V-ing
must I be think backing? must you be think backing? must he be think backing? must we be think backing? must you be think backing? must they be think backing?
Perfect
must I have think backed? must you have think backed? must he have think backed? must we have think backed? must you have think backed? must they have think backed?
Perfect en V-ing
must I have been think backing? must you have been think backing? must he have been think backing? must we have been think backing? must you have been think backing? must they have been think backing?
Forme interro-négative
Forme simple
mustn't I think back? mustn't you think back? mustn't he think back? mustn't we think back? mustn't you think back? mustn't they think back?
Forme en V-ing
mustn't I be think backing? mustn't you be think backing? mustn't he be think backing? mustn't we be think backing? mustn't you be think backing? mustn't they be think backing?
Perfect
mustn't I have think backed? mustn't you have think backed? mustn't he have think backed? mustn't we have think backed? mustn't you have think backed? mustn't they have think backed?
Perfect en V-ing
mustn't I have been think backing? mustn't you have been think backing? mustn't he have been think backing? mustn't we have been think backing? mustn't you have been think backing? mustn't they have been think backing?