English verb conjugation
COULD ESTIVATE

Regular verb: estivate - estivated - estivated

Affirmation

Simple form	V-ing form
I could estivate you could estivate he could estivate we could estivate you could estivate they could estivate	I could be estivating you could be estivating he could be estivating we could be estivating you could be estivating they could be estivating
Perfect	V-ing perfect
I could have estivated you could have estivated he could have estivated we could have estivated you could have estivated they could have estivated	I could have been estivating you could have been estivating he could have been estivating we could have been estivating you could have been estivating they could have been estivating

Negation

Simple form	V-ing form
I couldn't estivate you couldn't estivate he couldn't estivate we couldn't estivate you couldn't estivate they couldn't estivate	I couldn't be estivating you couldn't be estivating he couldn't be estivating we couldn't be estivating you couldn't be estivating they couldn't be estivating
Perfect	V-ing perfect
I couldn't have estivated you couldn't have estivated he couldn't have estivated we couldn't have estivated you couldn't have estivated they couldn't have estivated	I couldn't have been estivating you couldn't have been estivating he couldn't have been estivating we couldn't have been estivating you couldn't have been estivating they couldn't have been estivating

Interrogative form

Simple form	V-ing form
could I estivate? could you estivate? could he estivate? could we estivate? could you estivate? could they estivate?	could I be estivating? could you be estivating? could he be estivating? could we be estivating? could you be estivating? could they be estivating?
Perfect	V-ing perfect
could I have estivated? could you have estivated? could he have estivated? could we have estivated? could you have estivated? could they have estivated?	could I have been estivating? could you have been estivating? could he have been estivating? could we have been estivating? could you have been estivating? could they have been estivating?

Interro-negative form

Simple form	V-ing form
couldn't I estivate? couldn't you estivate? couldn't he estivate? couldn't we estivate? couldn't you estivate? couldn't they estivate?	couldn't I be estivating? couldn't you be estivating? couldn't he be estivating? couldn't we be estivating? couldn't you be estivating? couldn't they be estivating?
Perfect	V-ing perfect
couldn't I have estivated? couldn't you have estivated? couldn't he have estivated? couldn't we have estivated? couldn't you have estivated? couldn't they have estivated?	couldn't I have been estivating? couldn't you have been estivating? couldn't he have been estivating? couldn't we have been estivating? couldn't you have been estivating? couldn't they have been estivating?