must abandon
Regular verb: abandon - abandoned- abandoned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must abandon
you must abandon
she must abandon
we must abandon
you must abandon
they must abandon 	I must be abandoning
you must be abandoning
she must be abandoning
we must be abandoning
you must be abandoning
they must be abandoning	I must have abandoned
you must have abandoned
she must have abandoned
we must have abandoned
you must have abandoned
they must have abandoned	I must have been abandoning
you must have been abandoning
she must have been abandoning
we must have been abandoning
you must have been abandoning
they must have been abandoning	

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

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