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