I must abandon you must abandon he must abandon we must abandon you must abandon they must abandon
V-ing form
I must be abandoning you must be abandoning he must be abandoning we must be abandoning you must be abandoning they must be abandoning
Perfect
I must have abandoned you must have abandoned he must have abandoned we must have abandoned you must have abandoned they must have abandoned
V-ing perfect
I must have been abandoning you must have been abandoning he must have been abandoning we must have been abandoning you must have been abandoning they must have been abandoning
Negation
Simple form
I must not abandon you must not abandon he must not abandon we must not abandon you must not abandon they must not abandon
V-ing form
I must not be abandoning you must not be abandoning he must not be abandoning we must not be abandoning you must not be abandoning they must not be abandoning
Perfect
I must not have abandoned you must not have abandoned he must not have abandoned we must not have abandoned you must not have abandoned they must not have abandoned
V-ing perfect
I must not have been abandoning you must not have been abandoning he must not have been abandoning we must not have been abandoning you must not have been abandoning they must not have been abandoning
Interrogative form
Simple form
must I abandon? must you abandon? must he abandon? must we abandon? must you abandon? must they abandon?
V-ing form
must I be abandoning? must you be abandoning? must he be abandoning? must we be abandoning? must you be abandoning? must they be abandoning?
Perfect
must I have abandoned? must you have abandoned? must he have abandoned? must we have abandoned? must you have abandoned? must they have abandoned?
V-ing perfect
must I have been abandoning? must you have been abandoning? must he have been abandoning? must we have been abandoning? must you have been abandoning? must they have been abandoning?
Interro-negative form
Simple form
must I not abandon? must you not abandon? must he not abandon? must we not abandon? must you not abandon? must they not abandon?
V-ing form
must I not be abandoning? must you not be abandoning? must he not be abandoning? must we not be abandoning? must you not be abandoning? must they not be abandoning?
Perfect
must I not have abandoned? must you not have abandoned? must he not have abandoned? must we not have abandoned? must you not have abandoned? must they not have abandoned?
V-ing perfect
must I not have been abandoning? must you not have been abandoning? must he not have been abandoning? must we not have been abandoning? must you not have been abandoning? must they not have been abandoning?