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