English verb conjugation
MUST BUS

Regular verb: bus - bussed - bussed

Affirmation

Simple form	V-ing form
I must bus you must bus he must bus we must bus you must bus they must bus	I must be bussing you must be bussing he must be bussing we must be bussing you must be bussing they must be bussing
Perfect	V-ing perfect
I must have bussed you must have bussed he must have bussed we must have bussed you must have bussed they must have bussed	I must have been bussing you must have been bussing he must have been bussing we must have been bussing you must have been bussing they must have been bussing

Negation

Simple form	V-ing form
I mustn't bus you mustn't bus he mustn't bus we mustn't bus you mustn't bus they mustn't bus	I mustn't be bussing you mustn't be bussing he mustn't be bussing we mustn't be bussing you mustn't be bussing they mustn't be bussing
Perfect	V-ing perfect
I mustn't have bussed you mustn't have bussed he mustn't have bussed we mustn't have bussed you mustn't have bussed they mustn't have bussed	I mustn't have been bussing you mustn't have been bussing he mustn't have been bussing we mustn't have been bussing you mustn't have been bussing they mustn't have been bussing

Interrogative form

Simple form	V-ing form
must I bus? must you bus? must he bus? must we bus? must you bus? must they bus?	must I be bussing? must you be bussing? must he be bussing? must we be bussing? must you be bussing? must they be bussing?
Perfect	V-ing perfect
must I have bussed? must you have bussed? must he have bussed? must we have bussed? must you have bussed? must they have bussed?	must I have been bussing? must you have been bussing? must he have been bussing? must we have been bussing? must you have been bussing? must they have been bussing?

Interro-negative form

Simple form	V-ing form
mustn't I bus? mustn't you bus? mustn't he bus? mustn't we bus? mustn't you bus? mustn't they bus?	mustn't I be bussing? mustn't you be bussing? mustn't he be bussing? mustn't we be bussing? mustn't you be bussing? mustn't they be bussing?
Perfect	V-ing perfect
mustn't I have bussed? mustn't you have bussed? mustn't he have bussed? mustn't we have bussed? mustn't you have bussed? mustn't they have bussed?	mustn't I have been bussing? mustn't you have been bussing? mustn't he have been bussing? mustn't we have been bussing? mustn't you have been bussing? mustn't they have been bussing?