English verb conjugation
COULD DISAGREE

Regular verb: disagree - disagreed - disagreed

Affirmation

Simple form	V-ing form
I could disagree you could disagree she could disagree we could disagree you could disagree they could disagree	I could be disagreeing you could be disagreeing she could be disagreeing we could be disagreeing you could be disagreeing they could be disagreeing
Perfect	V-ing perfect
I could have disagreed you could have disagreed she could have disagreed we could have disagreed you could have disagreed they could have disagreed	I could have been disagreeing you could have been disagreeing she could have been disagreeing we could have been disagreeing you could have been disagreeing they could have been disagreeing

Negation

Simple form	V-ing form
I couldn't disagree you couldn't disagree she couldn't disagree we couldn't disagree you couldn't disagree they couldn't disagree	I couldn't be disagreeing you couldn't be disagreeing she couldn't be disagreeing we couldn't be disagreeing you couldn't be disagreeing they couldn't be disagreeing
Perfect	V-ing perfect
I couldn't have disagreed you couldn't have disagreed she couldn't have disagreed we couldn't have disagreed you couldn't have disagreed they couldn't have disagreed	I couldn't have been disagreeing you couldn't have been disagreeing she couldn't have been disagreeing we couldn't have been disagreeing you couldn't have been disagreeing they couldn't have been disagreeing

Interrogative form

Simple form	V-ing form
could I disagree? could you disagree? could she disagree? could we disagree? could you disagree? could they disagree?	could I be disagreeing? could you be disagreeing? could she be disagreeing? could we be disagreeing? could you be disagreeing? could they be disagreeing?
Perfect	V-ing perfect
could I have disagreed? could you have disagreed? could she have disagreed? could we have disagreed? could you have disagreed? could they have disagreed?	could I have been disagreeing? could you have been disagreeing? could she have been disagreeing? could we have been disagreeing? could you have been disagreeing? could they have been disagreeing?

Interro-negative form

Simple form	V-ing form
couldn't I disagree? couldn't you disagree? couldn't she disagree? couldn't we disagree? couldn't you disagree? couldn't they disagree?	couldn't I be disagreeing? couldn't you be disagreeing? couldn't she be disagreeing? couldn't we be disagreeing? couldn't you be disagreeing? couldn't they be disagreeing?
Perfect	V-ing perfect
couldn't I have disagreed? couldn't you have disagreed? couldn't she have disagreed? couldn't we have disagreed? couldn't you have disagreed? couldn't they have disagreed?	couldn't I have been disagreeing? couldn't you have been disagreeing? couldn't she have been disagreeing? couldn't we have been disagreeing? couldn't you have been disagreeing? couldn't they have been disagreeing?