English verb conjugation
MUST COCHAIR

Regular verb: cochair - cochaired - cochaired

Affirmation

Simple form	V-ing form
I must cochair you must cochair he must cochair we must cochair you must cochair they must cochair	I must be cochairing you must be cochairing he must be cochairing we must be cochairing you must be cochairing they must be cochairing
Perfect	V-ing perfect
I must have cochaired you must have cochaired he must have cochaired we must have cochaired you must have cochaired they must have cochaired	I must have been cochairing you must have been cochairing he must have been cochairing we must have been cochairing you must have been cochairing they must have been cochairing

Negation

Simple form	V-ing form
I mustn't cochair you mustn't cochair he mustn't cochair we mustn't cochair you mustn't cochair they mustn't cochair	I mustn't be cochairing you mustn't be cochairing he mustn't be cochairing we mustn't be cochairing you mustn't be cochairing they mustn't be cochairing
Perfect	V-ing perfect
I mustn't have cochaired you mustn't have cochaired he mustn't have cochaired we mustn't have cochaired you mustn't have cochaired they mustn't have cochaired	I mustn't have been cochairing you mustn't have been cochairing he mustn't have been cochairing we mustn't have been cochairing you mustn't have been cochairing they mustn't have been cochairing

Interrogative form

Simple form	V-ing form
must I cochair? must you cochair? must he cochair? must we cochair? must you cochair? must they cochair?	must I be cochairing? must you be cochairing? must he be cochairing? must we be cochairing? must you be cochairing? must they be cochairing?
Perfect	V-ing perfect
must I have cochaired? must you have cochaired? must he have cochaired? must we have cochaired? must you have cochaired? must they have cochaired?	must I have been cochairing? must you have been cochairing? must he have been cochairing? must we have been cochairing? must you have been cochairing? must they have been cochairing?

Interro-negative form

Simple form	V-ing form
mustn't I cochair? mustn't you cochair? mustn't he cochair? mustn't we cochair? mustn't you cochair? mustn't they cochair?	mustn't I be cochairing? mustn't you be cochairing? mustn't he be cochairing? mustn't we be cochairing? mustn't you be cochairing? mustn't they be cochairing?
Perfect	V-ing perfect
mustn't I have cochaired? mustn't you have cochaired? mustn't he have cochaired? mustn't we have cochaired? mustn't you have cochaired? mustn't they have cochaired?	mustn't I have been cochairing? mustn't you have been cochairing? mustn't he have been cochairing? mustn't we have been cochairing? mustn't you have been cochairing? mustn't they have been cochairing?