may backcross
Verbe régulier : backcross - backcrossed- backcrossed

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I may backcross
you may backcross
she may backcross
we may backcross
you may backcross
they may backcross 	I may be backcrossing
you may be backcrossing
she may be backcrossing
we may be backcrossing
you may be backcrossing
they may be backcrossing	I may have backcrossed
you may have backcrossed
she may have backcrossed
we may have backcrossed
you may have backcrossed
they may have backcrossed	I may have been backcrossing
you may have been backcrossing
she may have been backcrossing
we may have been backcrossing
you may have been backcrossing
they may have been backcrossing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mayn't backcross
you mayn't backcross
she mayn't backcross
we mayn't backcross
you mayn't backcross
they mayn't backcross 	I mayn't be backcrossing
you mayn't be backcrossing
she mayn't be backcrossing
we mayn't be backcrossing
you mayn't be backcrossing
they mayn't be backcrossing	I mayn't have backcrossed
you mayn't have backcrossed
she mayn't have backcrossed
we mayn't have backcrossed
you mayn't have backcrossed
they mayn't have backcrossed	I mayn't have been backcrossing
you mayn't have been backcrossing
she mayn't have been backcrossing
we mayn't have been backcrossing
you mayn't have been backcrossing
they mayn't have been backcrossing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
may I backcross?
may you backcross?
may she backcross?
may we backcross?
may you backcross?
may they backcross? 	may I be backcrossing?
may you be backcrossing?
may she be backcrossing?
may we be backcrossing?
may you be backcrossing?
may they be backcrossing? 	may I have backcrossed?
may you have backcrossed?
may she have backcrossed?
may we have backcrossed?
may you have backcrossed?
may they have backcrossed? 	may I have been backcrossing?
may you have been backcrossing?
may she have been backcrossing?
may we have been backcrossing?
may you have been backcrossing?
may they have been backcrossing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mayn't I backcross?
mayn't you backcross?
mayn't she backcross?
mayn't we backcross?
mayn't you backcross?
mayn't they backcross? 	mayn't I be backcrossing?
mayn't you be backcrossing?
mayn't she be backcrossing?
mayn't we be backcrossing?
mayn't you be backcrossing?
mayn't they be backcrossing? 	mayn't I have backcrossed?
mayn't you have backcrossed?
mayn't she have backcrossed?
mayn't we have backcrossed?
mayn't you have backcrossed?
mayn't they have backcrossed? 	mayn't I have been backcrossing?
mayn't you have been backcrossing?
mayn't she have been backcrossing?
mayn't we have been backcrossing?
mayn't you have been backcrossing?
mayn't they have been backcrossing?