can cochair
Regular verb: cochair - cochaired- cochaired

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

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

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

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