must overwinter
Verbe régulier : overwinter - overwintered- overwintered

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must overwinter
you must overwinter
she must overwinter
we must overwinter
you must overwinter
they must overwinter 	I must be overwintering
you must be overwintering
she must be overwintering
we must be overwintering
you must be overwintering
they must be overwintering	I must have overwintered
you must have overwintered
she must have overwintered
we must have overwintered
you must have overwintered
they must have overwintered	I must have been overwintering
you must have been overwintering
she must have been overwintering
we must have been overwintering
you must have been overwintering
they must have been overwintering	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't overwinter
you mustn't overwinter
she mustn't overwinter
we mustn't overwinter
you mustn't overwinter
they mustn't overwinter 	I mustn't be overwintering
you mustn't be overwintering
she mustn't be overwintering
we mustn't be overwintering
you mustn't be overwintering
they mustn't be overwintering	I mustn't have overwintered
you mustn't have overwintered
she mustn't have overwintered
we mustn't have overwintered
you mustn't have overwintered
they mustn't have overwintered	I mustn't have been overwintering
you mustn't have been overwintering
she mustn't have been overwintering
we mustn't have been overwintering
you mustn't have been overwintering
they mustn't have been overwintering	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I overwinter?
must you overwinter?
must she overwinter?
must we overwinter?
must you overwinter?
must they overwinter? 	must I be overwintering?
must you be overwintering?
must she be overwintering?
must we be overwintering?
must you be overwintering?
must they be overwintering? 	must I have overwintered?
must you have overwintered?
must she have overwintered?
must we have overwintered?
must you have overwintered?
must they have overwintered? 	must I have been overwintering?
must you have been overwintering?
must she have been overwintering?
must we have been overwintering?
must you have been overwintering?
must they have been overwintering? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I overwinter?
mustn't you overwinter?
mustn't she overwinter?
mustn't we overwinter?
mustn't you overwinter?
mustn't they overwinter? 	mustn't I be overwintering?
mustn't you be overwintering?
mustn't she be overwintering?
mustn't we be overwintering?
mustn't you be overwintering?
mustn't they be overwintering? 	mustn't I have overwintered?
mustn't you have overwintered?
mustn't she have overwintered?
mustn't we have overwintered?
mustn't you have overwintered?
mustn't they have overwintered? 	mustn't I have been overwintering?
mustn't you have been overwintering?
mustn't she have been overwintering?
mustn't we have been overwintering?
mustn't you have been overwintering?
mustn't they have been overwintering?