must choose
Irregular verb: choose - chose- chosen

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must choose
you must choose
she must choose
we must choose
you must choose
they must choose 	I must be choosing
you must be choosing
she must be choosing
we must be choosing
you must be choosing
they must be choosing	I must have chosen
you must have chosen
she must have chosen
we must have chosen
you must have chosen
they must have chosen	I must have been choosing
you must have been choosing
she must have been choosing
we must have been choosing
you must have been choosing
they must have been choosing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't choose
you mustn't choose
she mustn't choose
we mustn't choose
you mustn't choose
they mustn't choose 	I mustn't be choosing
you mustn't be choosing
she mustn't be choosing
we mustn't be choosing
you mustn't be choosing
they mustn't be choosing	I mustn't have chosen
you mustn't have chosen
she mustn't have chosen
we mustn't have chosen
you mustn't have chosen
they mustn't have chosen	I mustn't have been choosing
you mustn't have been choosing
she mustn't have been choosing
we mustn't have been choosing
you mustn't have been choosing
they mustn't have been choosing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I choose?
must you choose?
must she choose?
must we choose?
must you choose?
must they choose? 	must I be choosing?
must you be choosing?
must she be choosing?
must we be choosing?
must you be choosing?
must they be choosing? 	must I have chosen?
must you have chosen?
must she have chosen?
must we have chosen?
must you have chosen?
must they have chosen? 	must I have been choosing?
must you have been choosing?
must she have been choosing?
must we have been choosing?
must you have been choosing?
must they have been choosing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I choose?
mustn't you choose?
mustn't she choose?
mustn't we choose?
mustn't you choose?
mustn't they choose? 	mustn't I be choosing?
mustn't you be choosing?
mustn't she be choosing?
mustn't we be choosing?
mustn't you be choosing?
mustn't they be choosing? 	mustn't I have chosen?
mustn't you have chosen?
mustn't she have chosen?
mustn't we have chosen?
mustn't you have chosen?
mustn't they have chosen? 	mustn't I have been choosing?
mustn't you have been choosing?
mustn't she have been choosing?
mustn't we have been choosing?
mustn't you have been choosing?
mustn't they have been choosing?