I must prefertilize you must prefertilize he must prefertilize we must prefertilize you must prefertilize they must prefertilize
V-ing form
I must be prefertilizing you must be prefertilizing he must be prefertilizing we must be prefertilizing you must be prefertilizing they must be prefertilizing
Perfect
I must have prefertilized you must have prefertilized he must have prefertilized we must have prefertilized you must have prefertilized they must have prefertilized
V-ing perfect
I must have been prefertilizing you must have been prefertilizing he must have been prefertilizing we must have been prefertilizing you must have been prefertilizing they must have been prefertilizing
Negation
Simple form
I must not prefertilize you must not prefertilize he must not prefertilize we must not prefertilize you must not prefertilize they must not prefertilize
V-ing form
I must not be prefertilizing you must not be prefertilizing he must not be prefertilizing we must not be prefertilizing you must not be prefertilizing they must not be prefertilizing
Perfect
I must not have prefertilized you must not have prefertilized he must not have prefertilized we must not have prefertilized you must not have prefertilized they must not have prefertilized
V-ing perfect
I must not have been prefertilizing you must not have been prefertilizing he must not have been prefertilizing we must not have been prefertilizing you must not have been prefertilizing they must not have been prefertilizing
Interrogative form
Simple form
must I prefertilize? must you prefertilize? must he prefertilize? must we prefertilize? must you prefertilize? must they prefertilize?
V-ing form
must I be prefertilizing? must you be prefertilizing? must he be prefertilizing? must we be prefertilizing? must you be prefertilizing? must they be prefertilizing?
Perfect
must I have prefertilized? must you have prefertilized? must he have prefertilized? must we have prefertilized? must you have prefertilized? must they have prefertilized?
V-ing perfect
must I have been prefertilizing? must you have been prefertilizing? must he have been prefertilizing? must we have been prefertilizing? must you have been prefertilizing? must they have been prefertilizing?
Interro-negative form
Simple form
must I not prefertilize? must you not prefertilize? must he not prefertilize? must we not prefertilize? must you not prefertilize? must they not prefertilize?
V-ing form
must I not be prefertilizing? must you not be prefertilizing? must he not be prefertilizing? must we not be prefertilizing? must you not be prefertilizing? must they not be prefertilizing?
Perfect
must I not have prefertilized? must you not have prefertilized? must he not have prefertilized? must we not have prefertilized? must you not have prefertilized? must they not have prefertilized?
V-ing perfect
must I not have been prefertilizing? must you not have been prefertilizing? must he not have been prefertilizing? must we not have been prefertilizing? must you not have been prefertilizing? must they not have been prefertilizing?