English verb conjugation
MUST FEAST

Regular verb: feast - feasted - feasted

Affirmation

Simple form	V-ing form
I must feast you must feast he must feast we must feast you must feast they must feast	I must be feasting you must be feasting he must be feasting we must be feasting you must be feasting they must be feasting
Perfect	V-ing perfect
I must have feasted you must have feasted he must have feasted we must have feasted you must have feasted they must have feasted	I must have been feasting you must have been feasting he must have been feasting we must have been feasting you must have been feasting they must have been feasting

Negation

Simple form	V-ing form
I mustn't feast you mustn't feast he mustn't feast we mustn't feast you mustn't feast they mustn't feast	I mustn't be feasting you mustn't be feasting he mustn't be feasting we mustn't be feasting you mustn't be feasting they mustn't be feasting
Perfect	V-ing perfect
I mustn't have feasted you mustn't have feasted he mustn't have feasted we mustn't have feasted you mustn't have feasted they mustn't have feasted	I mustn't have been feasting you mustn't have been feasting he mustn't have been feasting we mustn't have been feasting you mustn't have been feasting they mustn't have been feasting

Interrogative form

Simple form	V-ing form
must I feast? must you feast? must he feast? must we feast? must you feast? must they feast?	must I be feasting? must you be feasting? must he be feasting? must we be feasting? must you be feasting? must they be feasting?
Perfect	V-ing perfect
must I have feasted? must you have feasted? must he have feasted? must we have feasted? must you have feasted? must they have feasted?	must I have been feasting? must you have been feasting? must he have been feasting? must we have been feasting? must you have been feasting? must they have been feasting?

Interro-negative form

Simple form	V-ing form
mustn't I feast? mustn't you feast? mustn't he feast? mustn't we feast? mustn't you feast? mustn't they feast?	mustn't I be feasting? mustn't you be feasting? mustn't he be feasting? mustn't we be feasting? mustn't you be feasting? mustn't they be feasting?
Perfect	V-ing perfect
mustn't I have feasted? mustn't you have feasted? mustn't he have feasted? mustn't we have feasted? mustn't you have feasted? mustn't they have feasted?	mustn't I have been feasting? mustn't you have been feasting? mustn't he have been feasting? mustn't we have been feasting? mustn't you have been feasting? mustn't they have been feasting?