English verb conjugation
COULD BUR

Regular verb: bur - bured - bured

Affirmation

Simple form	V-ing form
I could bur you could bur he could bur we could bur you could bur they could bur	I could be buring you could be buring he could be buring we could be buring you could be buring they could be buring
Perfect	V-ing perfect
I could have bured you could have bured he could have bured we could have bured you could have bured they could have bured	I could have been buring you could have been buring he could have been buring we could have been buring you could have been buring they could have been buring

Negation

Simple form	V-ing form
I couldn't bur you couldn't bur he couldn't bur we couldn't bur you couldn't bur they couldn't bur	I couldn't be buring you couldn't be buring he couldn't be buring we couldn't be buring you couldn't be buring they couldn't be buring
Perfect	V-ing perfect
I couldn't have bured you couldn't have bured he couldn't have bured we couldn't have bured you couldn't have bured they couldn't have bured	I couldn't have been buring you couldn't have been buring he couldn't have been buring we couldn't have been buring you couldn't have been buring they couldn't have been buring

Interrogative form

Simple form	V-ing form
could I bur? could you bur? could he bur? could we bur? could you bur? could they bur?	could I be buring? could you be buring? could he be buring? could we be buring? could you be buring? could they be buring?
Perfect	V-ing perfect
could I have bured? could you have bured? could he have bured? could we have bured? could you have bured? could they have bured?	could I have been buring? could you have been buring? could he have been buring? could we have been buring? could you have been buring? could they have been buring?

Interro-negative form

Simple form	V-ing form
couldn't I bur? couldn't you bur? couldn't he bur? couldn't we bur? couldn't you bur? couldn't they bur?	couldn't I be buring? couldn't you be buring? couldn't he be buring? couldn't we be buring? couldn't you be buring? couldn't they be buring?
Perfect	V-ing perfect
couldn't I have bured? couldn't you have bured? couldn't he have bured? couldn't we have bured? couldn't you have bured? couldn't they have bured?	couldn't I have been buring? couldn't you have been buring? couldn't he have been buring? couldn't we have been buring? couldn't you have been buring? couldn't they have been buring?