could label
Regular verb: label - labelled- labelled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could label
you could label
he could label
we could label
you could label
they could label 	I could be labelling
you could be labelling
he could be labelling
we could be labelling
you could be labelling
they could be labelling	I could have labelled
you could have labelled
he could have labelled
we could have labelled
you could have labelled
they could have labelled	I could have been labelling
you could have been labelling
he could have been labelling
we could have been labelling
you could have been labelling
they could have been labelling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not label
you could not label
he could not label
we could not label
you could not label
they could not label 	I could not be labelling
you could not be labelling
he could not be labelling
we could not be labelling
you could not be labelling
they could not be labelling	I could not have labelled
you could not have labelled
he could not have labelled
we could not have labelled
you could not have labelled
they could not have labelled	I could not have been labelling
you could not have been labelling
he could not have been labelling
we could not have been labelling
you could not have been labelling
they could not have been labelling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I label?
could you label?
could he label?
could we label?
could you label?
could they label? 	could I be labelling?
could you be labelling?
could he be labelling?
could we be labelling?
could you be labelling?
could they be labelling? 	could I have labelled?
could you have labelled?
could he have labelled?
could we have labelled?
could you have labelled?
could they have labelled? 	could I have been labelling?
could you have been labelling?
could he have been labelling?
could we have been labelling?
could you have been labelling?
could they have been labelling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not label?
could you not label?
could he not label?
could we not label?
could you not label?
could they not label? 	could I not be labelling?
could you not be labelling?
could he not be labelling?
could we not be labelling?
could you not be labelling?
could they not be labelling? 	could I not have labelled?
could you not have labelled?
could he not have labelled?
could we not have labelled?
could you not have labelled?
could they not have labelled? 	could I not have been labelling?
could you not have been labelling?
could he not have been labelling?
could we not have been labelling?
could you not have been labelling?
could they not have been labelling?