I must prospect you must prospect he must prospect we must prospect you must prospect they must prospect
V-ing form
I must be prospecting you must be prospecting he must be prospecting we must be prospecting you must be prospecting they must be prospecting
Perfect
I must have prospected you must have prospected he must have prospected we must have prospected you must have prospected they must have prospected
V-ing perfect
I must have been prospecting you must have been prospecting he must have been prospecting we must have been prospecting you must have been prospecting they must have been prospecting
Negation
Simple form
I must not prospect you must not prospect he must not prospect we must not prospect you must not prospect they must not prospect
V-ing form
I must not be prospecting you must not be prospecting he must not be prospecting we must not be prospecting you must not be prospecting they must not be prospecting
Perfect
I must not have prospected you must not have prospected he must not have prospected we must not have prospected you must not have prospected they must not have prospected
V-ing perfect
I must not have been prospecting you must not have been prospecting he must not have been prospecting we must not have been prospecting you must not have been prospecting they must not have been prospecting
Interrogative form
Simple form
must I prospect? must you prospect? must he prospect? must we prospect? must you prospect? must they prospect?
V-ing form
must I be prospecting? must you be prospecting? must he be prospecting? must we be prospecting? must you be prospecting? must they be prospecting?
Perfect
must I have prospected? must you have prospected? must he have prospected? must we have prospected? must you have prospected? must they have prospected?
V-ing perfect
must I have been prospecting? must you have been prospecting? must he have been prospecting? must we have been prospecting? must you have been prospecting? must they have been prospecting?
Interro-negative form
Simple form
must I not prospect? must you not prospect? must he not prospect? must we not prospect? must you not prospect? must they not prospect?
V-ing form
must I not be prospecting? must you not be prospecting? must he not be prospecting? must we not be prospecting? must you not be prospecting? must they not be prospecting?
Perfect
must I not have prospected? must you not have prospected? must he not have prospected? must we not have prospected? must you not have prospected? must they not have prospected?
V-ing perfect
must I not have been prospecting? must you not have been prospecting? must he not have been prospecting? must we not have been prospecting? must you not have been prospecting? must they not have been prospecting?