must backcross
Regelmä&szlig;iges Verb: backcross - backcrossed- backcrossed

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I must backcross
you must backcross
he must backcross
we must backcross
you must backcross
they must backcross 	I must be backcrossing
you must be backcrossing
he must be backcrossing
we must be backcrossing
you must be backcrossing
they must be backcrossing	I must have backcrossed
you must have backcrossed
he must have backcrossed
we must have backcrossed
you must have backcrossed
they must have backcrossed	I must have been backcrossing
you must have been backcrossing
he must have been backcrossing
we must have been backcrossing
you must have been backcrossing
they must have been backcrossing	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I must not backcross
you must not backcross
he must not backcross
we must not backcross
you must not backcross
they must not backcross 	I must not be backcrossing
you must not be backcrossing
he must not be backcrossing
we must not be backcrossing
you must not be backcrossing
they must not be backcrossing	I must not have backcrossed
you must not have backcrossed
he must not have backcrossed
we must not have backcrossed
you must not have backcrossed
they must not have backcrossed	I must not have been backcrossing
you must not have been backcrossing
he must not have been backcrossing
we must not have been backcrossing
you must not have been backcrossing
they must not have been backcrossing	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
must I backcross?
must you backcross?
must he backcross?
must we backcross?
must you backcross?
must they backcross? 	must I be backcrossing?
must you be backcrossing?
must he be backcrossing?
must we be backcrossing?
must you be backcrossing?
must they be backcrossing? 	must I have backcrossed?
must you have backcrossed?
must he have backcrossed?
must we have backcrossed?
must you have backcrossed?
must they have backcrossed? 	must I have been backcrossing?
must you have been backcrossing?
must he have been backcrossing?
must we have been backcrossing?
must you have been backcrossing?
must they have been backcrossing? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
must I not backcross?
must you not backcross?
must he not backcross?
must we not backcross?
must you not backcross?
must they not backcross? 	must I not be backcrossing?
must you not be backcrossing?
must he not be backcrossing?
must we not be backcrossing?
must you not be backcrossing?
must they not be backcrossing? 	must I not have backcrossed?
must you not have backcrossed?
must he not have backcrossed?
must we not have backcrossed?
must you not have backcrossed?
must they not have backcrossed? 	must I not have been backcrossing?
must you not have been backcrossing?
must he not have been backcrossing?
must we not have been backcrossing?
must you not have been backcrossing?
must they not have been backcrossing?