could itch
Regular verb: itch - itched- itched

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could itch
you could itch
he could itch
we could itch
you could itch
they could itch 	I could be itching
you could be itching
he could be itching
we could be itching
you could be itching
they could be itching	I could have itched
you could have itched
he could have itched
we could have itched
you could have itched
they could have itched	I could have been itching
you could have been itching
he could have been itching
we could have been itching
you could have been itching
they could have been itching	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not itch
you could not itch
he could not itch
we could not itch
you could not itch
they could not itch 	I could not be itching
you could not be itching
he could not be itching
we could not be itching
you could not be itching
they could not be itching	I could not have itched
you could not have itched
he could not have itched
we could not have itched
you could not have itched
they could not have itched	I could not have been itching
you could not have been itching
he could not have been itching
we could not have been itching
you could not have been itching
they could not have been itching	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I itch?
could you itch?
could he itch?
could we itch?
could you itch?
could they itch? 	could I be itching?
could you be itching?
could he be itching?
could we be itching?
could you be itching?
could they be itching? 	could I have itched?
could you have itched?
could he have itched?
could we have itched?
could you have itched?
could they have itched? 	could I have been itching?
could you have been itching?
could he have been itching?
could we have been itching?
could you have been itching?
could they have been itching? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not itch?
could you not itch?
could he not itch?
could we not itch?
could you not itch?
could they not itch? 	could I not be itching?
could you not be itching?
could he not be itching?
could we not be itching?
could you not be itching?
could they not be itching? 	could I not have itched?
could you not have itched?
could he not have itched?
could we not have itched?
could you not have itched?
could they not have itched? 	could I not have been itching?
could you not have been itching?
could he not have been itching?
could we not have been itching?
could you not have been itching?
could they not have been itching?