must chum
Verbe régulier : chum - chummed- chummed

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must chum
you must chum
he must chum
we must chum
you must chum
they must chum 	I must be chumming
you must be chumming
he must be chumming
we must be chumming
you must be chumming
they must be chumming	I must have chummed
you must have chummed
he must have chummed
we must have chummed
you must have chummed
they must have chummed	I must have been chumming
you must have been chumming
he must have been chumming
we must have been chumming
you must have been chumming
they must have been chumming	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not chum
you must not chum
he must not chum
we must not chum
you must not chum
they must not chum 	I must not be chumming
you must not be chumming
he must not be chumming
we must not be chumming
you must not be chumming
they must not be chumming	I must not have chummed
you must not have chummed
he must not have chummed
we must not have chummed
you must not have chummed
they must not have chummed	I must not have been chumming
you must not have been chumming
he must not have been chumming
we must not have been chumming
you must not have been chumming
they must not have been chumming	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I chum?
must you chum?
must he chum?
must we chum?
must you chum?
must they chum? 	must I be chumming?
must you be chumming?
must he be chumming?
must we be chumming?
must you be chumming?
must they be chumming? 	must I have chummed?
must you have chummed?
must he have chummed?
must we have chummed?
must you have chummed?
must they have chummed? 	must I have been chumming?
must you have been chumming?
must he have been chumming?
must we have been chumming?
must you have been chumming?
must they have been chumming? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not chum?
must you not chum?
must he not chum?
must we not chum?
must you not chum?
must they not chum? 	must I not be chumming?
must you not be chumming?
must he not be chumming?
must we not be chumming?
must you not be chumming?
must they not be chumming? 	must I not have chummed?
must you not have chummed?
must he not have chummed?
must we not have chummed?
must you not have chummed?
must they not have chummed? 	must I not have been chumming?
must you not have been chumming?
must he not have been chumming?
must we not have been chumming?
must you not have been chumming?
must they not have been chumming?