Verbo regular: backcross - backcrossed - backcrossed
Forma simple | Forma com 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 |
Perfeito | Perfeito com V-ing |
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 |
Forma simple | Forma com V-ing |
I mustn't backcross you mustn't backcross he mustn't backcross we mustn't backcross you mustn't backcross they mustn't backcross | I mustn't be backcrossing you mustn't be backcrossing he mustn't be backcrossing we mustn't be backcrossing you mustn't be backcrossing they mustn't be backcrossing |
Perfeito | Perfeito com V-ing |
I mustn't have backcrossed you mustn't have backcrossed he mustn't have backcrossed we mustn't have backcrossed you mustn't have backcrossed they mustn't have backcrossed | I mustn't have been backcrossing you mustn't have been backcrossing he mustn't have been backcrossing we mustn't have been backcrossing you mustn't have been backcrossing they mustn't have been backcrossing |
Forma simple | Forma com 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? |
Perfeito | Perfeito com V-ing |
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? |
Forma simple | Forma com V-ing |
mustn't I backcross? mustn't you backcross? mustn't he backcross? mustn't we backcross? mustn't you backcross? mustn't they backcross? | mustn't I be backcrossing? mustn't you be backcrossing? mustn't he be backcrossing? mustn't we be backcrossing? mustn't you be backcrossing? mustn't they be backcrossing? |
Perfeito | Perfeito com V-ing |
mustn't I have backcrossed? mustn't you have backcrossed? mustn't he have backcrossed? mustn't we have backcrossed? mustn't you have backcrossed? mustn't they have backcrossed? | mustn't I have been backcrossing? mustn't you have been backcrossing? mustn't he have been backcrossing? mustn't we have been backcrossing? mustn't you have been backcrossing? mustn't they have been backcrossing? |