can libel
Regular verb: libel - libelled- libelled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can libel
you can libel
he can libel
we can libel
you can libel
they can libel 	I can be libelling
you can be libelling
he can be libelling
we can be libelling
you can be libelling
they can be libelling	I can have libelled
you can have libelled
he can have libelled
we can have libelled
you can have libelled
they can have libelled	I can have been libelling
you can have been libelling
he can have been libelling
we can have been libelling
you can have been libelling
they can have been libelling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot libel
you cannot libel
he cannot libel
we cannot libel
you cannot libel
they cannot libel 	I cannot be libelling
you cannot be libelling
he cannot be libelling
we cannot be libelling
you cannot be libelling
they cannot be libelling	I cannot have libelled
you cannot have libelled
he cannot have libelled
we cannot have libelled
you cannot have libelled
they cannot have libelled	I cannot have been libelling
you cannot have been libelling
he cannot have been libelling
we cannot have been libelling
you cannot have been libelling
they cannot have been libelling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I libel?
can you libel?
can he libel?
can we libel?
can you libel?
can they libel? 	can I be libelling?
can you be libelling?
can he be libelling?
can we be libelling?
can you be libelling?
can they be libelling? 	can I have libelled?
can you have libelled?
can he have libelled?
can we have libelled?
can you have libelled?
can they have libelled? 	can I have been libelling?
can you have been libelling?
can he have been libelling?
can we have been libelling?
can you have been libelling?
can they have been libelling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not libel?
can you not libel?
can he not libel?
can we not libel?
can you not libel?
can they not libel? 	can I not be libelling?
can you not be libelling?
can he not be libelling?
can we not be libelling?
can you not be libelling?
can they not be libelling? 	can I not have libelled?
can you not have libelled?
can he not have libelled?
can we not have libelled?
can you not have libelled?
can they not have libelled? 	can I not have been libelling?
can you not have been libelling?
can he not have been libelling?
can we not have been libelling?
can you not have been libelling?
can they not have been libelling?