must regress
Verbo regular: regress - regressed- regressed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must regress
you must regress
he must regress
we must regress
you must regress
they must regress 	I must be regressing
you must be regressing
he must be regressing
we must be regressing
you must be regressing
they must be regressing	I must have regressed
you must have regressed
he must have regressed
we must have regressed
you must have regressed
they must have regressed	I must have been regressing
you must have been regressing
he must have been regressing
we must have been regressing
you must have been regressing
they must have been regressing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not regress
you must not regress
he must not regress
we must not regress
you must not regress
they must not regress 	I must not be regressing
you must not be regressing
he must not be regressing
we must not be regressing
you must not be regressing
they must not be regressing	I must not have regressed
you must not have regressed
he must not have regressed
we must not have regressed
you must not have regressed
they must not have regressed	I must not have been regressing
you must not have been regressing
he must not have been regressing
we must not have been regressing
you must not have been regressing
they must not have been regressing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I regress?
must you regress?
must he regress?
must we regress?
must you regress?
must they regress? 	must I be regressing?
must you be regressing?
must he be regressing?
must we be regressing?
must you be regressing?
must they be regressing? 	must I have regressed?
must you have regressed?
must he have regressed?
must we have regressed?
must you have regressed?
must they have regressed? 	must I have been regressing?
must you have been regressing?
must he have been regressing?
must we have been regressing?
must you have been regressing?
must they have been regressing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not regress?
must you not regress?
must he not regress?
must we not regress?
must you not regress?
must they not regress? 	must I not be regressing?
must you not be regressing?
must he not be regressing?
must we not be regressing?
must you not be regressing?
must they not be regressing? 	must I not have regressed?
must you not have regressed?
must he not have regressed?
must we not have regressed?
must you not have regressed?
must they not have regressed? 	must I not have been regressing?
must you not have been regressing?
must he not have been regressing?
must we not have been regressing?
must you not have been regressing?
must they not have been regressing?