I must fertilize you must fertilize she must fertilize we must fertilize you must fertilize they must fertilize
V-ing form
I must be fertilizing you must be fertilizing she must be fertilizing we must be fertilizing you must be fertilizing they must be fertilizing
Perfect
I must have fertilized you must have fertilized she must have fertilized we must have fertilized you must have fertilized they must have fertilized
V-ing perfect
I must have been fertilizing you must have been fertilizing she must have been fertilizing we must have been fertilizing you must have been fertilizing they must have been fertilizing
Negation
Simple form
I must not fertilize you must not fertilize she must not fertilize we must not fertilize you must not fertilize they must not fertilize
V-ing form
I must not be fertilizing you must not be fertilizing she must not be fertilizing we must not be fertilizing you must not be fertilizing they must not be fertilizing
Perfect
I must not have fertilized you must not have fertilized she must not have fertilized we must not have fertilized you must not have fertilized they must not have fertilized
V-ing perfect
I must not have been fertilizing you must not have been fertilizing she must not have been fertilizing we must not have been fertilizing you must not have been fertilizing they must not have been fertilizing
Interrogative form
Simple form
must I fertilize? must you fertilize? must she fertilize? must we fertilize? must you fertilize? must they fertilize?
V-ing form
must I be fertilizing? must you be fertilizing? must she be fertilizing? must we be fertilizing? must you be fertilizing? must they be fertilizing?
Perfect
must I have fertilized? must you have fertilized? must she have fertilized? must we have fertilized? must you have fertilized? must they have fertilized?
V-ing perfect
must I have been fertilizing? must you have been fertilizing? must she have been fertilizing? must we have been fertilizing? must you have been fertilizing? must they have been fertilizing?
Interro-negative form
Simple form
must I not fertilize? must you not fertilize? must she not fertilize? must we not fertilize? must you not fertilize? must they not fertilize?
V-ing form
must I not be fertilizing? must you not be fertilizing? must she not be fertilizing? must we not be fertilizing? must you not be fertilizing? must they not be fertilizing?
Perfect
must I not have fertilized? must you not have fertilized? must she not have fertilized? must we not have fertilized? must you not have fertilized? must they not have fertilized?
V-ing perfect
must I not have been fertilizing? must you not have been fertilizing? must she not have been fertilizing? must we not have been fertilizing? must you not have been fertilizing? must they not have been fertilizing?