must grin
Verbe régulier : grin - grinned- grinned
Traduction française : sourire 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must grin
you must grin
she must grin
we must grin
you must grin
they must grin 	I must be grinning
you must be grinning
she must be grinning
we must be grinning
you must be grinning
they must be grinning	I must have grinned
you must have grinned
she must have grinned
we must have grinned
you must have grinned
they must have grinned	I must have been grinning
you must have been grinning
she must have been grinning
we must have been grinning
you must have been grinning
they must have been grinning	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't grin
you mustn't grin
she mustn't grin
we mustn't grin
you mustn't grin
they mustn't grin 	I mustn't be grinning
you mustn't be grinning
she mustn't be grinning
we mustn't be grinning
you mustn't be grinning
they mustn't be grinning	I mustn't have grinned
you mustn't have grinned
she mustn't have grinned
we mustn't have grinned
you mustn't have grinned
they mustn't have grinned	I mustn't have been grinning
you mustn't have been grinning
she mustn't have been grinning
we mustn't have been grinning
you mustn't have been grinning
they mustn't have been grinning	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I grin?
must you grin?
must she grin?
must we grin?
must you grin?
must they grin? 	must I be grinning?
must you be grinning?
must she be grinning?
must we be grinning?
must you be grinning?
must they be grinning? 	must I have grinned?
must you have grinned?
must she have grinned?
must we have grinned?
must you have grinned?
must they have grinned? 	must I have been grinning?
must you have been grinning?
must she have been grinning?
must we have been grinning?
must you have been grinning?
must they have been grinning? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I grin?
mustn't you grin?
mustn't she grin?
mustn't we grin?
mustn't you grin?
mustn't they grin? 	mustn't I be grinning?
mustn't you be grinning?
mustn't she be grinning?
mustn't we be grinning?
mustn't you be grinning?
mustn't they be grinning? 	mustn't I have grinned?
mustn't you have grinned?
mustn't she have grinned?
mustn't we have grinned?
mustn't you have grinned?
mustn't they have grinned? 	mustn't I have been grinning?
mustn't you have been grinning?
mustn't she have been grinning?
mustn't we have been grinning?
mustn't you have been grinning?
mustn't they have been grinning?