must croak
Verbe régulier : croak - croaked- croaked
Traduction française : coasser - dire d'une voix rauque ou éraillée 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must croak
you must croak
he must croak
we must croak
you must croak
they must croak 	I must be croaking
you must be croaking
he must be croaking
we must be croaking
you must be croaking
they must be croaking	I must have croaked
you must have croaked
he must have croaked
we must have croaked
you must have croaked
they must have croaked	I must have been croaking
you must have been croaking
he must have been croaking
we must have been croaking
you must have been croaking
they must have been croaking	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't croak
you mustn't croak
he mustn't croak
we mustn't croak
you mustn't croak
they mustn't croak 	I mustn't be croaking
you mustn't be croaking
he mustn't be croaking
we mustn't be croaking
you mustn't be croaking
they mustn't be croaking	I mustn't have croaked
you mustn't have croaked
he mustn't have croaked
we mustn't have croaked
you mustn't have croaked
they mustn't have croaked	I mustn't have been croaking
you mustn't have been croaking
he mustn't have been croaking
we mustn't have been croaking
you mustn't have been croaking
they mustn't have been croaking	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I croak?
must you croak?
must he croak?
must we croak?
must you croak?
must they croak? 	must I be croaking?
must you be croaking?
must he be croaking?
must we be croaking?
must you be croaking?
must they be croaking? 	must I have croaked?
must you have croaked?
must he have croaked?
must we have croaked?
must you have croaked?
must they have croaked? 	must I have been croaking?
must you have been croaking?
must he have been croaking?
must we have been croaking?
must you have been croaking?
must they have been croaking? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I croak?
mustn't you croak?
mustn't he croak?
mustn't we croak?
mustn't you croak?
mustn't they croak? 	mustn't I be croaking?
mustn't you be croaking?
mustn't he be croaking?
mustn't we be croaking?
mustn't you be croaking?
mustn't they be croaking? 	mustn't I have croaked?
mustn't you have croaked?
mustn't he have croaked?
mustn't we have croaked?
mustn't you have croaked?
mustn't they have croaked? 	mustn't I have been croaking?
mustn't you have been croaking?
mustn't he have been croaking?
mustn't we have been croaking?
mustn't you have been croaking?
mustn't they have been croaking?