English verb conjugation
COULD SHEAVE

Regular verb: sheave - sheaved - sheaved

Affirmation

Simple form	V-ing form
I could sheave you could sheave he could sheave we could sheave you could sheave they could sheave	I could be sheaving you could be sheaving he could be sheaving we could be sheaving you could be sheaving they could be sheaving
Perfect	V-ing perfect
I could have sheaved you could have sheaved he could have sheaved we could have sheaved you could have sheaved they could have sheaved	I could have been sheaving you could have been sheaving he could have been sheaving we could have been sheaving you could have been sheaving they could have been sheaving

Negation

Simple form	V-ing form
I could not sheave you could not sheave he could not sheave we could not sheave you could not sheave they could not sheave	I could not be sheaving you could not be sheaving he could not be sheaving we could not be sheaving you could not be sheaving they could not be sheaving
Perfect	V-ing perfect
I could not have sheaved you could not have sheaved he could not have sheaved we could not have sheaved you could not have sheaved they could not have sheaved	I could not have been sheaving you could not have been sheaving he could not have been sheaving we could not have been sheaving you could not have been sheaving they could not have been sheaving

Interrogative form

Simple form	V-ing form
could I sheave? could you sheave? could he sheave? could we sheave? could you sheave? could they sheave?	could I be sheaving? could you be sheaving? could he be sheaving? could we be sheaving? could you be sheaving? could they be sheaving?
Perfect	V-ing perfect
could I have sheaved? could you have sheaved? could he have sheaved? could we have sheaved? could you have sheaved? could they have sheaved?	could I have been sheaving? could you have been sheaving? could he have been sheaving? could we have been sheaving? could you have been sheaving? could they have been sheaving?

Interro-negative form

Simple form	V-ing form
could I not sheave? could you not sheave? could he not sheave? could we not sheave? could you not sheave? could they not sheave?	could I not be sheaving? could you not be sheaving? could he not be sheaving? could we not be sheaving? could you not be sheaving? could they not be sheaving?
Perfect	V-ing perfect
could I not have sheaved? could you not have sheaved? could he not have sheaved? could we not have sheaved? could you not have sheaved? could they not have sheaved?	could I not have been sheaving? could you not have been sheaving? could he not have been sheaving? could we not have been sheaving? could you not have been sheaving? could they not have been sheaving?