English verb conjugation
COULD HELLO

Regular verb: hello - helloed - helloed

Affirmation

Simple form	V-ing form
I could hello you could hello he could hello we could hello you could hello they could hello	I could be helloing you could be helloing he could be helloing we could be helloing you could be helloing they could be helloing
Perfect	V-ing perfect
I could have helloed you could have helloed he could have helloed we could have helloed you could have helloed they could have helloed	I could have been helloing you could have been helloing he could have been helloing we could have been helloing you could have been helloing they could have been helloing

Negation

Simple form	V-ing form
I could not hello you could not hello he could not hello we could not hello you could not hello they could not hello	I could not be helloing you could not be helloing he could not be helloing we could not be helloing you could not be helloing they could not be helloing
Perfect	V-ing perfect
I could not have helloed you could not have helloed he could not have helloed we could not have helloed you could not have helloed they could not have helloed	I could not have been helloing you could not have been helloing he could not have been helloing we could not have been helloing you could not have been helloing they could not have been helloing

Interrogative form

Simple form	V-ing form
could I hello? could you hello? could he hello? could we hello? could you hello? could they hello?	could I be helloing? could you be helloing? could he be helloing? could we be helloing? could you be helloing? could they be helloing?
Perfect	V-ing perfect
could I have helloed? could you have helloed? could he have helloed? could we have helloed? could you have helloed? could they have helloed?	could I have been helloing? could you have been helloing? could he have been helloing? could we have been helloing? could you have been helloing? could they have been helloing?

Interro-negative form

Simple form	V-ing form
could I not hello? could you not hello? could he not hello? could we not hello? could you not hello? could they not hello?	could I not be helloing? could you not be helloing? could he not be helloing? could we not be helloing? could you not be helloing? could they not be helloing?
Perfect	V-ing perfect
could I not have helloed? could you not have helloed? could he not have helloed? could we not have helloed? could you not have helloed? could they not have helloed?	could I not have been helloing? could you not have been helloing? could he not have been helloing? could we not have been helloing? could you not have been helloing? could they not have been helloing?