English verb conjugation
MUST EXPAND

Regular verb: expand - expanded - expanded

Affirmation

Simple form	V-ing form
I must expand you must expand he must expand we must expand you must expand they must expand	I must be expanding you must be expanding he must be expanding we must be expanding you must be expanding they must be expanding
Perfect	V-ing perfect
I must have expanded you must have expanded he must have expanded we must have expanded you must have expanded they must have expanded	I must have been expanding you must have been expanding he must have been expanding we must have been expanding you must have been expanding they must have been expanding

Negation

Simple form	V-ing form
I mustn't expand you mustn't expand he mustn't expand we mustn't expand you mustn't expand they mustn't expand	I mustn't be expanding you mustn't be expanding he mustn't be expanding we mustn't be expanding you mustn't be expanding they mustn't be expanding
Perfect	V-ing perfect
I mustn't have expanded you mustn't have expanded he mustn't have expanded we mustn't have expanded you mustn't have expanded they mustn't have expanded	I mustn't have been expanding you mustn't have been expanding he mustn't have been expanding we mustn't have been expanding you mustn't have been expanding they mustn't have been expanding

Interrogative form

Simple form	V-ing form
must I expand? must you expand? must he expand? must we expand? must you expand? must they expand?	must I be expanding? must you be expanding? must he be expanding? must we be expanding? must you be expanding? must they be expanding?
Perfect	V-ing perfect
must I have expanded? must you have expanded? must he have expanded? must we have expanded? must you have expanded? must they have expanded?	must I have been expanding? must you have been expanding? must he have been expanding? must we have been expanding? must you have been expanding? must they have been expanding?

Interro-negative form

Simple form	V-ing form
mustn't I expand? mustn't you expand? mustn't he expand? mustn't we expand? mustn't you expand? mustn't they expand?	mustn't I be expanding? mustn't you be expanding? mustn't he be expanding? mustn't we be expanding? mustn't you be expanding? mustn't they be expanding?
Perfect	V-ing perfect
mustn't I have expanded? mustn't you have expanded? mustn't he have expanded? mustn't we have expanded? mustn't you have expanded? mustn't they have expanded?	mustn't I have been expanding? mustn't you have been expanding? mustn't he have been expanding? mustn't we have been expanding? mustn't you have been expanding? mustn't they have been expanding?