English verb conjugation
MUST FIX

Regular verb: fix - fixed - fixed

Affirmation

Simple form	V-ing form
I must fix you must fix he must fix we must fix you must fix they must fix	I must be fixing you must be fixing he must be fixing we must be fixing you must be fixing they must be fixing
Perfect	V-ing perfect
I must have fixed you must have fixed he must have fixed we must have fixed you must have fixed they must have fixed	I must have been fixing you must have been fixing he must have been fixing we must have been fixing you must have been fixing they must have been fixing

Negation

Simple form	V-ing form
I must not fix you must not fix he must not fix we must not fix you must not fix they must not fix	I must not be fixing you must not be fixing he must not be fixing we must not be fixing you must not be fixing they must not be fixing
Perfect	V-ing perfect
I must not have fixed you must not have fixed he must not have fixed we must not have fixed you must not have fixed they must not have fixed	I must not have been fixing you must not have been fixing he must not have been fixing we must not have been fixing you must not have been fixing they must not have been fixing

Interrogative form

Simple form	V-ing form
must I fix? must you fix? must he fix? must we fix? must you fix? must they fix?	must I be fixing? must you be fixing? must he be fixing? must we be fixing? must you be fixing? must they be fixing?
Perfect	V-ing perfect
must I have fixed? must you have fixed? must he have fixed? must we have fixed? must you have fixed? must they have fixed?	must I have been fixing? must you have been fixing? must he have been fixing? must we have been fixing? must you have been fixing? must they have been fixing?

Interro-negative form

Simple form	V-ing form
must I not fix? must you not fix? must he not fix? must we not fix? must you not fix? must they not fix?	must I not be fixing? must you not be fixing? must he not be fixing? must we not be fixing? must you not be fixing? must they not be fixing?
Perfect	V-ing perfect
must I not have fixed? must you not have fixed? must he not have fixed? must we not have fixed? must you not have fixed? must they not have fixed?	must I not have been fixing? must you not have been fixing? must he not have been fixing? must we not have been fixing? must you not have been fixing? must they not have been fixing?