can litter
Regular verb: litter - littered- littered

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot litter
you cannot litter
he cannot litter
we cannot litter
you cannot litter
they cannot litter 	I cannot be littering
you cannot be littering
he cannot be littering
we cannot be littering
you cannot be littering
they cannot be littering	I cannot have littered
you cannot have littered
he cannot have littered
we cannot have littered
you cannot have littered
they cannot have littered	I cannot have been littering
you cannot have been littering
he cannot have been littering
we cannot have been littering
you cannot have been littering
they cannot have been littering	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not litter?
can you not litter?
can he not litter?
can we not litter?
can you not litter?
can they not litter? 	can I not be littering?
can you not be littering?
can he not be littering?
can we not be littering?
can you not be littering?
can they not be littering? 	can I not have littered?
can you not have littered?
can he not have littered?
can we not have littered?
can you not have littered?
can they not have littered? 	can I not have been littering?
can you not have been littering?
can he not have been littering?
can we not have been littering?
can you not have been littering?
can they not have been littering?