must credit
Regular verb: credit - credited- credited

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must credit
you must credit
she must credit
we must credit
you must credit
they must credit 	I must be crediting
you must be crediting
she must be crediting
we must be crediting
you must be crediting
they must be crediting	I must have credited
you must have credited
she must have credited
we must have credited
you must have credited
they must have credited	I must have been crediting
you must have been crediting
she must have been crediting
we must have been crediting
you must have been crediting
they must have been crediting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't credit
you mustn't credit
she mustn't credit
we mustn't credit
you mustn't credit
they mustn't credit 	I mustn't be crediting
you mustn't be crediting
she mustn't be crediting
we mustn't be crediting
you mustn't be crediting
they mustn't be crediting	I mustn't have credited
you mustn't have credited
she mustn't have credited
we mustn't have credited
you mustn't have credited
they mustn't have credited	I mustn't have been crediting
you mustn't have been crediting
she mustn't have been crediting
we mustn't have been crediting
you mustn't have been crediting
they mustn't have been crediting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I credit?
must you credit?
must she credit?
must we credit?
must you credit?
must they credit? 	must I be crediting?
must you be crediting?
must she be crediting?
must we be crediting?
must you be crediting?
must they be crediting? 	must I have credited?
must you have credited?
must she have credited?
must we have credited?
must you have credited?
must they have credited? 	must I have been crediting?
must you have been crediting?
must she have been crediting?
must we have been crediting?
must you have been crediting?
must they have been crediting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I credit?
mustn't you credit?
mustn't she credit?
mustn't we credit?
mustn't you credit?
mustn't they credit? 	mustn't I be crediting?
mustn't you be crediting?
mustn't she be crediting?
mustn't we be crediting?
mustn't you be crediting?
mustn't they be crediting? 	mustn't I have credited?
mustn't you have credited?
mustn't she have credited?
mustn't we have credited?
mustn't you have credited?
mustn't they have credited? 	mustn't I have been crediting?
mustn't you have been crediting?
mustn't she have been crediting?
mustn't we have been crediting?
mustn't you have been crediting?
mustn't they have been crediting?