must overwinter
Verbo regular: overwinter - overwintered- overwintered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not overwinter
you must not overwinter
she must not overwinter
we must not overwinter
you must not overwinter
they must not overwinter 	I must not be overwintering
you must not be overwintering
she must not be overwintering
we must not be overwintering
you must not be overwintering
they must not be overwintering	I must not have overwintered
you must not have overwintered
she must not have overwintered
we must not have overwintered
you must not have overwintered
they must not have overwintered	I must not have been overwintering
you must not have been overwintering
she must not have been overwintering
we must not have been overwintering
you must not have been overwintering
they must not have been overwintering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not overwinter?
must you not overwinter?
must she not overwinter?
must we not overwinter?
must you not overwinter?
must they not overwinter? 	must I not be overwintering?
must you not be overwintering?
must she not be overwintering?
must we not be overwintering?
must you not be overwintering?
must they not be overwintering? 	must I not have overwintered?
must you not have overwintered?
must she not have overwintered?
must we not have overwintered?
must you not have overwintered?
must they not have overwintered? 	must I not have been overwintering?
must you not have been overwintering?
must she not have been overwintering?
must we not have been overwintering?
must you not have been overwintering?
must they not have been overwintering?