I must precondition you must precondition he must precondition we must precondition you must precondition they must precondition
V-ing form
I must be preconditioning you must be preconditioning he must be preconditioning we must be preconditioning you must be preconditioning they must be preconditioning
Perfect
I must have preconditioned you must have preconditioned he must have preconditioned we must have preconditioned you must have preconditioned they must have preconditioned
V-ing perfect
I must have been preconditioning you must have been preconditioning he must have been preconditioning we must have been preconditioning you must have been preconditioning they must have been preconditioning
Negation
Simple form
I mustn't precondition you mustn't precondition he mustn't precondition we mustn't precondition you mustn't precondition they mustn't precondition
V-ing form
I mustn't be preconditioning you mustn't be preconditioning he mustn't be preconditioning we mustn't be preconditioning you mustn't be preconditioning they mustn't be preconditioning
Perfect
I mustn't have preconditioned you mustn't have preconditioned he mustn't have preconditioned we mustn't have preconditioned you mustn't have preconditioned they mustn't have preconditioned
V-ing perfect
I mustn't have been preconditioning you mustn't have been preconditioning he mustn't have been preconditioning we mustn't have been preconditioning you mustn't have been preconditioning they mustn't have been preconditioning
Interrogative form
Simple form
must I precondition? must you precondition? must he precondition? must we precondition? must you precondition? must they precondition?
V-ing form
must I be preconditioning? must you be preconditioning? must he be preconditioning? must we be preconditioning? must you be preconditioning? must they be preconditioning?
Perfect
must I have preconditioned? must you have preconditioned? must he have preconditioned? must we have preconditioned? must you have preconditioned? must they have preconditioned?
V-ing perfect
must I have been preconditioning? must you have been preconditioning? must he have been preconditioning? must we have been preconditioning? must you have been preconditioning? must they have been preconditioning?
Interro-negative form
Simple form
mustn't I precondition? mustn't you precondition? mustn't he precondition? mustn't we precondition? mustn't you precondition? mustn't they precondition?
V-ing form
mustn't I be preconditioning? mustn't you be preconditioning? mustn't he be preconditioning? mustn't we be preconditioning? mustn't you be preconditioning? mustn't they be preconditioning?
Perfect
mustn't I have preconditioned? mustn't you have preconditioned? mustn't he have preconditioned? mustn't we have preconditioned? mustn't you have preconditioned? mustn't they have preconditioned?
V-ing perfect
mustn't I have been preconditioning? mustn't you have been preconditioning? mustn't he have been preconditioning? mustn't we have been preconditioning? mustn't you have been preconditioning? mustn't they have been preconditioning?