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 couldn't sheave you couldn't sheave he couldn't sheave we couldn't sheave you couldn't sheave they couldn't sheave	I couldn't be sheaving you couldn't be sheaving he couldn't be sheaving we couldn't be sheaving you couldn't be sheaving they couldn't be sheaving
Perfect	V-ing perfect
I couldn't have sheaved you couldn't have sheaved he couldn't have sheaved we couldn't have sheaved you couldn't have sheaved they couldn't have sheaved	I couldn't have been sheaving you couldn't have been sheaving he couldn't have been sheaving we couldn't have been sheaving you couldn't have been sheaving they couldn't 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
couldn't I sheave? couldn't you sheave? couldn't he sheave? couldn't we sheave? couldn't you sheave? couldn't they sheave?	couldn't I be sheaving? couldn't you be sheaving? couldn't he be sheaving? couldn't we be sheaving? couldn't you be sheaving? couldn't they be sheaving?
Perfect	V-ing perfect
couldn't I have sheaved? couldn't you have sheaved? couldn't he have sheaved? couldn't we have sheaved? couldn't you have sheaved? couldn't they have sheaved?	couldn't I have been sheaving? couldn't you have been sheaving? couldn't he have been sheaving? couldn't we have been sheaving? couldn't you have been sheaving? couldn't they have been sheaving?