must litter
Verbo regular: litter - littered- littered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must litter
you must litter
he must litter
we must litter
you must litter
they must litter 	I must be littering
you must be littering
he must be littering
we must be littering
you must be littering
they must be littering	I must have littered
you must have littered
he must have littered
we must have littered
you must have littered
they must have littered	I must have been littering
you must have been littering
he must have been littering
we must have been littering
you must have been littering
they must have been littering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not litter
you must not litter
he must not litter
we must not litter
you must not litter
they must not litter 	I must not be littering
you must not be littering
he must not be littering
we must not be littering
you must not be littering
they must not be littering	I must not have littered
you must not have littered
he must not have littered
we must not have littered
you must not have littered
they must not have littered	I must not have been littering
you must not have been littering
he must not have been littering
we must not have been littering
you must not have been littering
they must not have been littering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I litter?
must you litter?
must he litter?
must we litter?
must you litter?
must they litter? 	must I be littering?
must you be littering?
must he be littering?
must we be littering?
must you be littering?
must they be littering? 	must I have littered?
must you have littered?
must he have littered?
must we have littered?
must you have littered?
must they have littered? 	must I have been littering?
must you have been littering?
must he have been littering?
must we have been littering?
must you have been littering?
must they have been littering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not litter?
must you not litter?
must he not litter?
must we not litter?
must you not litter?
must they not litter? 	must I not be littering?
must you not be littering?
must he not be littering?
must we not be littering?
must you not be littering?
must they not be littering? 	must I not have littered?
must you not have littered?
must he not have littered?
must we not have littered?
must you not have littered?
must they not have littered? 	must I not have been littering?
must you not have been littering?
must he not have been littering?
must we not have been littering?
must you not have been littering?
must they not have been littering?