English verb conjugation
COULD CAT

Regular verb: cat - cated - cated

Affirmation

Simple form	V-ing form
I could cat you could cat she could cat we could cat you could cat they could cat	I could be cating you could be cating she could be cating we could be cating you could be cating they could be cating
Perfect	V-ing perfect
I could have cated you could have cated she could have cated we could have cated you could have cated they could have cated	I could have been cating you could have been cating she could have been cating we could have been cating you could have been cating they could have been cating

Negation

Simple form	V-ing form
I couldn't cat you couldn't cat she couldn't cat we couldn't cat you couldn't cat they couldn't cat	I couldn't be cating you couldn't be cating she couldn't be cating we couldn't be cating you couldn't be cating they couldn't be cating
Perfect	V-ing perfect
I couldn't have cated you couldn't have cated she couldn't have cated we couldn't have cated you couldn't have cated they couldn't have cated	I couldn't have been cating you couldn't have been cating she couldn't have been cating we couldn't have been cating you couldn't have been cating they couldn't have been cating

Interrogative form

Simple form	V-ing form
could I cat? could you cat? could she cat? could we cat? could you cat? could they cat?	could I be cating? could you be cating? could she be cating? could we be cating? could you be cating? could they be cating?
Perfect	V-ing perfect
could I have cated? could you have cated? could she have cated? could we have cated? could you have cated? could they have cated?	could I have been cating? could you have been cating? could she have been cating? could we have been cating? could you have been cating? could they have been cating?

Interro-negative form

Simple form	V-ing form
couldn't I cat? couldn't you cat? couldn't she cat? couldn't we cat? couldn't you cat? couldn't they cat?	couldn't I be cating? couldn't you be cating? couldn't she be cating? couldn't we be cating? couldn't you be cating? couldn't they be cating?
Perfect	V-ing perfect
couldn't I have cated? couldn't you have cated? couldn't she have cated? couldn't we have cated? couldn't you have cated? couldn't they have cated?	couldn't I have been cating? couldn't you have been cating? couldn't she have been cating? couldn't we have been cating? couldn't you have been cating? couldn't they have been cating?