English verb conjugation
COULD DOWNGRADE

Regular verb: downgrade - downgraded - downgraded

Affirmation

Simple form	V-ing form
I could downgrade you could downgrade he could downgrade we could downgrade you could downgrade they could downgrade	I could be downgrading you could be downgrading he could be downgrading we could be downgrading you could be downgrading they could be downgrading
Perfect	V-ing perfect
I could have downgraded you could have downgraded he could have downgraded we could have downgraded you could have downgraded they could have downgraded	I could have been downgrading you could have been downgrading he could have been downgrading we could have been downgrading you could have been downgrading they could have been downgrading

Negation

Simple form	V-ing form
I couldn't downgrade you couldn't downgrade he couldn't downgrade we couldn't downgrade you couldn't downgrade they couldn't downgrade	I couldn't be downgrading you couldn't be downgrading he couldn't be downgrading we couldn't be downgrading you couldn't be downgrading they couldn't be downgrading
Perfect	V-ing perfect
I couldn't have downgraded you couldn't have downgraded he couldn't have downgraded we couldn't have downgraded you couldn't have downgraded they couldn't have downgraded	I couldn't have been downgrading you couldn't have been downgrading he couldn't have been downgrading we couldn't have been downgrading you couldn't have been downgrading they couldn't have been downgrading

Interrogative form

Simple form	V-ing form
could I downgrade? could you downgrade? could he downgrade? could we downgrade? could you downgrade? could they downgrade?	could I be downgrading? could you be downgrading? could he be downgrading? could we be downgrading? could you be downgrading? could they be downgrading?
Perfect	V-ing perfect
could I have downgraded? could you have downgraded? could he have downgraded? could we have downgraded? could you have downgraded? could they have downgraded?	could I have been downgrading? could you have been downgrading? could he have been downgrading? could we have been downgrading? could you have been downgrading? could they have been downgrading?

Interro-negative form

Simple form	V-ing form
couldn't I downgrade? couldn't you downgrade? couldn't he downgrade? couldn't we downgrade? couldn't you downgrade? couldn't they downgrade?	couldn't I be downgrading? couldn't you be downgrading? couldn't he be downgrading? couldn't we be downgrading? couldn't you be downgrading? couldn't they be downgrading?
Perfect	V-ing perfect
couldn't I have downgraded? couldn't you have downgraded? couldn't he have downgraded? couldn't we have downgraded? couldn't you have downgraded? couldn't they have downgraded?	couldn't I have been downgrading? couldn't you have been downgrading? couldn't he have been downgrading? couldn't we have been downgrading? couldn't you have been downgrading? couldn't they have been downgrading?