English verb conjugation
MUST BREAKFAST

Regular verb: breakfast - breakfasted - breakfasted

Affirmation

Simple form	V-ing form
I must breakfast you must breakfast she must breakfast we must breakfast you must breakfast they must breakfast	I must be breakfasting you must be breakfasting she must be breakfasting we must be breakfasting you must be breakfasting they must be breakfasting
Perfect	V-ing perfect
I must have breakfasted you must have breakfasted she must have breakfasted we must have breakfasted you must have breakfasted they must have breakfasted	I must have been breakfasting you must have been breakfasting she must have been breakfasting we must have been breakfasting you must have been breakfasting they must have been breakfasting

Negation

Simple form	V-ing form
I mustn't breakfast you mustn't breakfast she mustn't breakfast we mustn't breakfast you mustn't breakfast they mustn't breakfast	I mustn't be breakfasting you mustn't be breakfasting she mustn't be breakfasting we mustn't be breakfasting you mustn't be breakfasting they mustn't be breakfasting
Perfect	V-ing perfect
I mustn't have breakfasted you mustn't have breakfasted she mustn't have breakfasted we mustn't have breakfasted you mustn't have breakfasted they mustn't have breakfasted	I mustn't have been breakfasting you mustn't have been breakfasting she mustn't have been breakfasting we mustn't have been breakfasting you mustn't have been breakfasting they mustn't have been breakfasting

Interrogative form

Simple form	V-ing form
must I breakfast? must you breakfast? must she breakfast? must we breakfast? must you breakfast? must they breakfast?	must I be breakfasting? must you be breakfasting? must she be breakfasting? must we be breakfasting? must you be breakfasting? must they be breakfasting?
Perfect	V-ing perfect
must I have breakfasted? must you have breakfasted? must she have breakfasted? must we have breakfasted? must you have breakfasted? must they have breakfasted?	must I have been breakfasting? must you have been breakfasting? must she have been breakfasting? must we have been breakfasting? must you have been breakfasting? must they have been breakfasting?

Interro-negative form

Simple form	V-ing form
mustn't I breakfast? mustn't you breakfast? mustn't she breakfast? mustn't we breakfast? mustn't you breakfast? mustn't they breakfast?	mustn't I be breakfasting? mustn't you be breakfasting? mustn't she be breakfasting? mustn't we be breakfasting? mustn't you be breakfasting? mustn't they be breakfasting?
Perfect	V-ing perfect
mustn't I have breakfasted? mustn't you have breakfasted? mustn't she have breakfasted? mustn't we have breakfasted? mustn't you have breakfasted? mustn't they have breakfasted?	mustn't I have been breakfasting? mustn't you have been breakfasting? mustn't she have been breakfasting? mustn't we have been breakfasting? mustn't you have been breakfasting? mustn't they have been breakfasting?