English verb conjugation
COULD ELABORATE

Regular verb: elaborate - elaborated - elaborated

Affirmation

Simple form	V-ing form
I could elaborate you could elaborate he could elaborate we could elaborate you could elaborate they could elaborate	I could be elaborating you could be elaborating he could be elaborating we could be elaborating you could be elaborating they could be elaborating
Perfect	V-ing perfect
I could have elaborated you could have elaborated he could have elaborated we could have elaborated you could have elaborated they could have elaborated	I could have been elaborating you could have been elaborating he could have been elaborating we could have been elaborating you could have been elaborating they could have been elaborating

Negation

Simple form	V-ing form
I couldn't elaborate you couldn't elaborate he couldn't elaborate we couldn't elaborate you couldn't elaborate they couldn't elaborate	I couldn't be elaborating you couldn't be elaborating he couldn't be elaborating we couldn't be elaborating you couldn't be elaborating they couldn't be elaborating
Perfect	V-ing perfect
I couldn't have elaborated you couldn't have elaborated he couldn't have elaborated we couldn't have elaborated you couldn't have elaborated they couldn't have elaborated	I couldn't have been elaborating you couldn't have been elaborating he couldn't have been elaborating we couldn't have been elaborating you couldn't have been elaborating they couldn't have been elaborating

Interrogative form

Simple form	V-ing form
could I elaborate? could you elaborate? could he elaborate? could we elaborate? could you elaborate? could they elaborate?	could I be elaborating? could you be elaborating? could he be elaborating? could we be elaborating? could you be elaborating? could they be elaborating?
Perfect	V-ing perfect
could I have elaborated? could you have elaborated? could he have elaborated? could we have elaborated? could you have elaborated? could they have elaborated?	could I have been elaborating? could you have been elaborating? could he have been elaborating? could we have been elaborating? could you have been elaborating? could they have been elaborating?

Interro-negative form

Simple form	V-ing form
couldn't I elaborate? couldn't you elaborate? couldn't he elaborate? couldn't we elaborate? couldn't you elaborate? couldn't they elaborate?	couldn't I be elaborating? couldn't you be elaborating? couldn't he be elaborating? couldn't we be elaborating? couldn't you be elaborating? couldn't they be elaborating?
Perfect	V-ing perfect
couldn't I have elaborated? couldn't you have elaborated? couldn't he have elaborated? couldn't we have elaborated? couldn't you have elaborated? couldn't they have elaborated?	couldn't I have been elaborating? couldn't you have been elaborating? couldn't he have been elaborating? couldn't we have been elaborating? couldn't you have been elaborating? couldn't they have been elaborating?