must overfertilize
Regular verb: overfertilize - overfertilized- overfertilized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must overfertilize
you must overfertilize
she must overfertilize
we must overfertilize
you must overfertilize
they must overfertilize 	I must be overfertilizing
you must be overfertilizing
she must be overfertilizing
we must be overfertilizing
you must be overfertilizing
they must be overfertilizing	I must have overfertilized
you must have overfertilized
she must have overfertilized
we must have overfertilized
you must have overfertilized
they must have overfertilized	I must have been overfertilizing
you must have been overfertilizing
she must have been overfertilizing
we must have been overfertilizing
you must have been overfertilizing
they must have been overfertilizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't overfertilize
you mustn't overfertilize
she mustn't overfertilize
we mustn't overfertilize
you mustn't overfertilize
they mustn't overfertilize 	I mustn't be overfertilizing
you mustn't be overfertilizing
she mustn't be overfertilizing
we mustn't be overfertilizing
you mustn't be overfertilizing
they mustn't be overfertilizing	I mustn't have overfertilized
you mustn't have overfertilized
she mustn't have overfertilized
we mustn't have overfertilized
you mustn't have overfertilized
they mustn't have overfertilized	I mustn't have been overfertilizing
you mustn't have been overfertilizing
she mustn't have been overfertilizing
we mustn't have been overfertilizing
you mustn't have been overfertilizing
they mustn't have been overfertilizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I overfertilize?
must you overfertilize?
must she overfertilize?
must we overfertilize?
must you overfertilize?
must they overfertilize? 	must I be overfertilizing?
must you be overfertilizing?
must she be overfertilizing?
must we be overfertilizing?
must you be overfertilizing?
must they be overfertilizing? 	must I have overfertilized?
must you have overfertilized?
must she have overfertilized?
must we have overfertilized?
must you have overfertilized?
must they have overfertilized? 	must I have been overfertilizing?
must you have been overfertilizing?
must she have been overfertilizing?
must we have been overfertilizing?
must you have been overfertilizing?
must they have been overfertilizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I overfertilize?
mustn't you overfertilize?
mustn't she overfertilize?
mustn't we overfertilize?
mustn't you overfertilize?
mustn't they overfertilize? 	mustn't I be overfertilizing?
mustn't you be overfertilizing?
mustn't she be overfertilizing?
mustn't we be overfertilizing?
mustn't you be overfertilizing?
mustn't they be overfertilizing? 	mustn't I have overfertilized?
mustn't you have overfertilized?
mustn't she have overfertilized?
mustn't we have overfertilized?
mustn't you have overfertilized?
mustn't they have overfertilized? 	mustn't I have been overfertilizing?
mustn't you have been overfertilizing?
mustn't she have been overfertilizing?
mustn't we have been overfertilizing?
mustn't you have been overfertilizing?
mustn't they have been overfertilizing?