must chin
Regular verb: chin - chined- chined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must chin
you must chin
he must chin
we must chin
you must chin
they must chin 	I must be chining
you must be chining
he must be chining
we must be chining
you must be chining
they must be chining	I must have chined
you must have chined
he must have chined
we must have chined
you must have chined
they must have chined	I must have been chining
you must have been chining
he must have been chining
we must have been chining
you must have been chining
they must have been chining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't chin
you mustn't chin
he mustn't chin
we mustn't chin
you mustn't chin
they mustn't chin 	I mustn't be chining
you mustn't be chining
he mustn't be chining
we mustn't be chining
you mustn't be chining
they mustn't be chining	I mustn't have chined
you mustn't have chined
he mustn't have chined
we mustn't have chined
you mustn't have chined
they mustn't have chined	I mustn't have been chining
you mustn't have been chining
he mustn't have been chining
we mustn't have been chining
you mustn't have been chining
they mustn't have been chining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I chin?
must you chin?
must he chin?
must we chin?
must you chin?
must they chin? 	must I be chining?
must you be chining?
must he be chining?
must we be chining?
must you be chining?
must they be chining? 	must I have chined?
must you have chined?
must he have chined?
must we have chined?
must you have chined?
must they have chined? 	must I have been chining?
must you have been chining?
must he have been chining?
must we have been chining?
must you have been chining?
must they have been chining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I chin?
mustn't you chin?
mustn't he chin?
mustn't we chin?
mustn't you chin?
mustn't they chin? 	mustn't I be chining?
mustn't you be chining?
mustn't he be chining?
mustn't we be chining?
mustn't you be chining?
mustn't they be chining? 	mustn't I have chined?
mustn't you have chined?
mustn't he have chined?
mustn't we have chined?
mustn't you have chined?
mustn't they have chined? 	mustn't I have been chining?
mustn't you have been chining?
mustn't he have been chining?
mustn't we have been chining?
mustn't you have been chining?
mustn't they have been chining?