must litter
Regular verb: litter - littered- littered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must litter
you must litter
she must litter
we must litter
you must litter
they must litter 	I must be littering
you must be littering
she must be littering
we must be littering
you must be littering
they must be littering	I must have littered
you must have littered
she 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
she must have been littering
we must have been littering
you must have been littering
they must have been littering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't litter
you mustn't litter
she mustn't litter
we mustn't litter
you mustn't litter
they mustn't litter 	I mustn't be littering
you mustn't be littering
she mustn't be littering
we mustn't be littering
you mustn't be littering
they mustn't be littering	I mustn't have littered
you mustn't have littered
she mustn't have littered
we mustn't have littered
you mustn't have littered
they mustn't have littered	I mustn't have been littering
you mustn't have been littering
she mustn't have been littering
we mustn't have been littering
you mustn't have been littering
they mustn't have been littering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I litter?
must you litter?
must she litter?
must we litter?
must you litter?
must they litter? 	must I be littering?
must you be littering?
must she be littering?
must we be littering?
must you be littering?
must they be littering? 	must I have littered?
must you have littered?
must she 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 she have been littering?
must we have been littering?
must you have been littering?
must they have been littering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I litter?
mustn't you litter?
mustn't she litter?
mustn't we litter?
mustn't you litter?
mustn't they litter? 	mustn't I be littering?
mustn't you be littering?
mustn't she be littering?
mustn't we be littering?
mustn't you be littering?
mustn't they be littering? 	mustn't I have littered?
mustn't you have littered?
mustn't she have littered?
mustn't we have littered?
mustn't you have littered?
mustn't they have littered? 	mustn't I have been littering?
mustn't you have been littering?
mustn't she have been littering?
mustn't we have been littering?
mustn't you have been littering?
mustn't they have been littering?