could cross-fertilize
Regular verb: cross-fertilize - cross-fertilized- cross-fertilized

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not cross-fertilize
you could not cross-fertilize
he could not cross-fertilize
we could not cross-fertilize
you could not cross-fertilize
they could not cross-fertilize 	I could not be cross-fertilizing
you could not be cross-fertilizing
he could not be cross-fertilizing
we could not be cross-fertilizing
you could not be cross-fertilizing
they could not be cross-fertilizing	I could not have cross-fertilized
you could not have cross-fertilized
he could not have cross-fertilized
we could not have cross-fertilized
you could not have cross-fertilized
they could not have cross-fertilized	I could not have been cross-fertilizing
you could not have been cross-fertilizing
he could not have been cross-fertilizing
we could not have been cross-fertilizing
you could not have been cross-fertilizing
they could not have been cross-fertilizing	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not cross-fertilize?
could you not cross-fertilize?
could he not cross-fertilize?
could we not cross-fertilize?
could you not cross-fertilize?
could they not cross-fertilize? 	could I not be cross-fertilizing?
could you not be cross-fertilizing?
could he not be cross-fertilizing?
could we not be cross-fertilizing?
could you not be cross-fertilizing?
could they not be cross-fertilizing? 	could I not have cross-fertilized?
could you not have cross-fertilized?
could he not have cross-fertilized?
could we not have cross-fertilized?
could you not have cross-fertilized?
could they not have cross-fertilized? 	could I not have been cross-fertilizing?
could you not have been cross-fertilizing?
could he not have been cross-fertilizing?
could we not have been cross-fertilizing?
could you not have been cross-fertilizing?
could they not have been cross-fertilizing?