English verb conjugation
MUST CHUG

Regular verb: chug - chugged - chugged

Affirmation

Simple form	V-ing form
I must chug you must chug he must chug we must chug you must chug they must chug	I must be chugging you must be chugging he must be chugging we must be chugging you must be chugging they must be chugging
Perfect	V-ing perfect
I must have chugged you must have chugged he must have chugged we must have chugged you must have chugged they must have chugged	I must have been chugging you must have been chugging he must have been chugging we must have been chugging you must have been chugging they must have been chugging

Negation

Simple form	V-ing form
I mustn't chug you mustn't chug he mustn't chug we mustn't chug you mustn't chug they mustn't chug	I mustn't be chugging you mustn't be chugging he mustn't be chugging we mustn't be chugging you mustn't be chugging they mustn't be chugging
Perfect	V-ing perfect
I mustn't have chugged you mustn't have chugged he mustn't have chugged we mustn't have chugged you mustn't have chugged they mustn't have chugged	I mustn't have been chugging you mustn't have been chugging he mustn't have been chugging we mustn't have been chugging you mustn't have been chugging they mustn't have been chugging

Interrogative form

Simple form	V-ing form
must I chug? must you chug? must he chug? must we chug? must you chug? must they chug?	must I be chugging? must you be chugging? must he be chugging? must we be chugging? must you be chugging? must they be chugging?
Perfect	V-ing perfect
must I have chugged? must you have chugged? must he have chugged? must we have chugged? must you have chugged? must they have chugged?	must I have been chugging? must you have been chugging? must he have been chugging? must we have been chugging? must you have been chugging? must they have been chugging?

Interro-negative form

Simple form	V-ing form
mustn't I chug? mustn't you chug? mustn't he chug? mustn't we chug? mustn't you chug? mustn't they chug?	mustn't I be chugging? mustn't you be chugging? mustn't he be chugging? mustn't we be chugging? mustn't you be chugging? mustn't they be chugging?
Perfect	V-ing perfect
mustn't I have chugged? mustn't you have chugged? mustn't he have chugged? mustn't we have chugged? mustn't you have chugged? mustn't they have chugged?	mustn't I have been chugging? mustn't you have been chugging? mustn't he have been chugging? mustn't we have been chugging? mustn't you have been chugging? mustn't they have been chugging?