must cochair
Regular verb: cochair - cochaired- cochaired

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
I must not cochair
you must not cochair
he must not cochair
we must not cochair
you must not cochair
they must not cochair 	I must not be cochairing
you must not be cochairing
he must not be cochairing
we must not be cochairing
you must not be cochairing
they must not be cochairing	I must not have cochaired
you must not have cochaired
he must not have cochaired
we must not have cochaired
you must not have cochaired
they must not have cochaired	I must not have been cochairing
you must not have been cochairing
he must not have been cochairing
we must not have been cochairing
you must not have been cochairing
they must not have been cochairing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
must I not cochair?
must you not cochair?
must he not cochair?
must we not cochair?
must you not cochair?
must they not cochair? 	must I not be cochairing?
must you not be cochairing?
must he not be cochairing?
must we not be cochairing?
must you not be cochairing?
must they not be cochairing? 	must I not have cochaired?
must you not have cochaired?
must he not have cochaired?
must we not have cochaired?
must you not have cochaired?
must they not have cochaired? 	must I not have been cochairing?
must you not have been cochairing?
must he not have been cochairing?
must we not have been cochairing?
must you not have been cochairing?
must they not have been cochairing?