must fertilize
Verbo regular: fertilize - fertilized- fertilized

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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	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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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	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	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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? 	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? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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? 	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?