can backcross
Verbo regular: backcross - backcrossed- backcrossed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can backcross
you can backcross
she can backcross
we can backcross
you can backcross
they can backcross 	I can be backcrossing
you can be backcrossing
she can be backcrossing
we can be backcrossing
you can be backcrossing
they can be backcrossing	I can have backcrossed
you can have backcrossed
she can have backcrossed
we can have backcrossed
you can have backcrossed
they can have backcrossed	I can have been backcrossing
you can have been backcrossing
she can have been backcrossing
we can have been backcrossing
you can have been backcrossing
they can have been backcrossing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot backcross
you cannot backcross
she cannot backcross
we cannot backcross
you cannot backcross
they cannot backcross 	I cannot be backcrossing
you cannot be backcrossing
she cannot be backcrossing
we cannot be backcrossing
you cannot be backcrossing
they cannot be backcrossing	I cannot have backcrossed
you cannot have backcrossed
she cannot have backcrossed
we cannot have backcrossed
you cannot have backcrossed
they cannot have backcrossed	I cannot have been backcrossing
you cannot have been backcrossing
she cannot have been backcrossing
we cannot have been backcrossing
you cannot have been backcrossing
they cannot have been backcrossing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I backcross?
can you backcross?
can she backcross?
can we backcross?
can you backcross?
can they backcross? 	can I be backcrossing?
can you be backcrossing?
can she be backcrossing?
can we be backcrossing?
can you be backcrossing?
can they be backcrossing? 	can I have backcrossed?
can you have backcrossed?
can she have backcrossed?
can we have backcrossed?
can you have backcrossed?
can they have backcrossed? 	can I have been backcrossing?
can you have been backcrossing?
can she have been backcrossing?
can we have been backcrossing?
can you have been backcrossing?
can they have been backcrossing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not backcross?
can you not backcross?
can she not backcross?
can we not backcross?
can you not backcross?
can they not backcross? 	can I not be backcrossing?
can you not be backcrossing?
can she not be backcrossing?
can we not be backcrossing?
can you not be backcrossing?
can they not be backcrossing? 	can I not have backcrossed?
can you not have backcrossed?
can she not have backcrossed?
can we not have backcrossed?
can you not have backcrossed?
can they not have backcrossed? 	can I not have been backcrossing?
can you not have been backcrossing?
can she not have been backcrossing?
can we not have been backcrossing?
can you not have been backcrossing?
can they not have been backcrossing?