I must preregulate you must preregulate she must preregulate we must preregulate you must preregulate they must preregulate
V-ing form
I must be preregulating you must be preregulating she must be preregulating we must be preregulating you must be preregulating they must be preregulating
Perfect
I must have preregulated you must have preregulated she must have preregulated we must have preregulated you must have preregulated they must have preregulated
V-ing perfect
I must have been preregulating you must have been preregulating she must have been preregulating we must have been preregulating you must have been preregulating they must have been preregulating
Negation
Simple form
I must not preregulate you must not preregulate she must not preregulate we must not preregulate you must not preregulate they must not preregulate
V-ing form
I must not be preregulating you must not be preregulating she must not be preregulating we must not be preregulating you must not be preregulating they must not be preregulating
Perfect
I must not have preregulated you must not have preregulated she must not have preregulated we must not have preregulated you must not have preregulated they must not have preregulated
V-ing perfect
I must not have been preregulating you must not have been preregulating she must not have been preregulating we must not have been preregulating you must not have been preregulating they must not have been preregulating
Interrogative form
Simple form
must I preregulate? must you preregulate? must she preregulate? must we preregulate? must you preregulate? must they preregulate?
V-ing form
must I be preregulating? must you be preregulating? must she be preregulating? must we be preregulating? must you be preregulating? must they be preregulating?
Perfect
must I have preregulated? must you have preregulated? must she have preregulated? must we have preregulated? must you have preregulated? must they have preregulated?
V-ing perfect
must I have been preregulating? must you have been preregulating? must she have been preregulating? must we have been preregulating? must you have been preregulating? must they have been preregulating?
Interro-negative form
Simple form
must I not preregulate? must you not preregulate? must she not preregulate? must we not preregulate? must you not preregulate? must they not preregulate?
V-ing form
must I not be preregulating? must you not be preregulating? must she not be preregulating? must we not be preregulating? must you not be preregulating? must they not be preregulating?
Perfect
must I not have preregulated? must you not have preregulated? must she not have preregulated? must we not have preregulated? must you not have preregulated? must they not have preregulated?
V-ing perfect
must I not have been preregulating? must you not have been preregulating? must she not have been preregulating? must we not have been preregulating? must you not have been preregulating? must they not have been preregulating?