English verb conjugation
MUST FERTILIZE

Regular verb: fertilize - fertilized - fertilized

Affirmation

Simple form	V-ing form
I must fertilize you must fertilize he must fertilize we must fertilize you must fertilize they must fertilize	I must be fertilizing you must be fertilizing he must be fertilizing we must be fertilizing you must be fertilizing they must be fertilizing
Perfect	V-ing perfect
I must have fertilized you must have fertilized he must have fertilized we must have fertilized you must have fertilized they must have fertilized	I must have been fertilizing you must have been fertilizing he must have been fertilizing we must have been fertilizing you must have been fertilizing they must have been fertilizing

Negation

Simple form	V-ing form
I mustn't fertilize you mustn't fertilize he mustn't fertilize we mustn't fertilize you mustn't fertilize they mustn't fertilize	I mustn't be fertilizing you mustn't be fertilizing he mustn't be fertilizing we mustn't be fertilizing you mustn't be fertilizing they mustn't be fertilizing
Perfect	V-ing perfect
I mustn't have fertilized you mustn't have fertilized he mustn't have fertilized we mustn't have fertilized you mustn't have fertilized they mustn't have fertilized	I mustn't have been fertilizing you mustn't have been fertilizing he mustn't have been fertilizing we mustn't have been fertilizing you mustn't have been fertilizing they mustn't have been fertilizing

Interrogative form

Simple form	V-ing form
must I fertilize? must you fertilize? must he fertilize? must we fertilize? must you fertilize? must they fertilize?	must I be fertilizing? must you be fertilizing? must he be fertilizing? must we be fertilizing? must you be fertilizing? must they be fertilizing?
Perfect	V-ing perfect
must I have fertilized? must you have fertilized? must he have fertilized? must we have fertilized? must you have fertilized? must they have fertilized?	must I have been fertilizing? must you have been fertilizing? must he have been fertilizing? must we have been fertilizing? must you have been fertilizing? must they have been fertilizing?

Interro-negative form

Simple form	V-ing form
mustn't I fertilize? mustn't you fertilize? mustn't he fertilize? mustn't we fertilize? mustn't you fertilize? mustn't they fertilize?	mustn't I be fertilizing? mustn't you be fertilizing? mustn't he be fertilizing? mustn't we be fertilizing? mustn't you be fertilizing? mustn't they be fertilizing?
Perfect	V-ing perfect
mustn't I have fertilized? mustn't you have fertilized? mustn't he have fertilized? mustn't we have fertilized? mustn't you have fertilized? mustn't they have fertilized?	mustn't I have been fertilizing? mustn't you have been fertilizing? mustn't he have been fertilizing? mustn't we have been fertilizing? mustn't you have been fertilizing? mustn't they have been fertilizing?