can fertilize
Regular verb: fertilize - fertilized- fertilized

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

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

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

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