English verb conjugation
COULD WAVE

Regular verb: wave - waved - waved

Affirmation

Simple form	V-ing form
I could wave you could wave he could wave we could wave you could wave they could wave	I could be waving you could be waving he could be waving we could be waving you could be waving they could be waving
Perfect	V-ing perfect
I could have waved you could have waved he could have waved we could have waved you could have waved they could have waved	I could have been waving you could have been waving he could have been waving we could have been waving you could have been waving they could have been waving

Negation

Simple form	V-ing form
I could not wave you could not wave he could not wave we could not wave you could not wave they could not wave	I could not be waving you could not be waving he could not be waving we could not be waving you could not be waving they could not be waving
Perfect	V-ing perfect
I could not have waved you could not have waved he could not have waved we could not have waved you could not have waved they could not have waved	I could not have been waving you could not have been waving he could not have been waving we could not have been waving you could not have been waving they could not have been waving

Interrogative form

Simple form	V-ing form
could I wave? could you wave? could he wave? could we wave? could you wave? could they wave?	could I be waving? could you be waving? could he be waving? could we be waving? could you be waving? could they be waving?
Perfect	V-ing perfect
could I have waved? could you have waved? could he have waved? could we have waved? could you have waved? could they have waved?	could I have been waving? could you have been waving? could he have been waving? could we have been waving? could you have been waving? could they have been waving?

Interro-negative form

Simple form	V-ing form
could I not wave? could you not wave? could he not wave? could we not wave? could you not wave? could they not wave?	could I not be waving? could you not be waving? could he not be waving? could we not be waving? could you not be waving? could they not be waving?
Perfect	V-ing perfect
could I not have waved? could you not have waved? could he not have waved? could we not have waved? could you not have waved? could they not have waved?	could I not have been waving? could you not have been waving? could he not have been waving? could we not have been waving? could you not have been waving? could they not have been waving?