English verb conjugation
COULD YACKETY-YACK

Regular verb: yackety-yack - yackety-yacked - yackety-yacked

Affirmation

Simple form	V-ing form
I could yackety-yack you could yackety-yack she could yackety-yack we could yackety-yack you could yackety-yack they could yackety-yack	I could be yackety-yacking you could be yackety-yacking she could be yackety-yacking we could be yackety-yacking you could be yackety-yacking they could be yackety-yacking
Perfect	V-ing perfect
I could have yackety-yacked you could have yackety-yacked she could have yackety-yacked we could have yackety-yacked you could have yackety-yacked they could have yackety-yacked	I could have been yackety-yacking you could have been yackety-yacking she could have been yackety-yacking we could have been yackety-yacking you could have been yackety-yacking they could have been yackety-yacking

Negation

Simple form	V-ing form
I couldn't yackety-yack you couldn't yackety-yack she couldn't yackety-yack we couldn't yackety-yack you couldn't yackety-yack they couldn't yackety-yack	I couldn't be yackety-yacking you couldn't be yackety-yacking she couldn't be yackety-yacking we couldn't be yackety-yacking you couldn't be yackety-yacking they couldn't be yackety-yacking
Perfect	V-ing perfect
I couldn't have yackety-yacked you couldn't have yackety-yacked she couldn't have yackety-yacked we couldn't have yackety-yacked you couldn't have yackety-yacked they couldn't have yackety-yacked	I couldn't have been yackety-yacking you couldn't have been yackety-yacking she couldn't have been yackety-yacking we couldn't have been yackety-yacking you couldn't have been yackety-yacking they couldn't have been yackety-yacking

Interrogative form

Simple form	V-ing form
could I yackety-yack? could you yackety-yack? could she yackety-yack? could we yackety-yack? could you yackety-yack? could they yackety-yack?	could I be yackety-yacking? could you be yackety-yacking? could she be yackety-yacking? could we be yackety-yacking? could you be yackety-yacking? could they be yackety-yacking?
Perfect	V-ing perfect
could I have yackety-yacked? could you have yackety-yacked? could she have yackety-yacked? could we have yackety-yacked? could you have yackety-yacked? could they have yackety-yacked?	could I have been yackety-yacking? could you have been yackety-yacking? could she have been yackety-yacking? could we have been yackety-yacking? could you have been yackety-yacking? could they have been yackety-yacking?

Interro-negative form

Simple form	V-ing form
couldn't I yackety-yack? couldn't you yackety-yack? couldn't she yackety-yack? couldn't we yackety-yack? couldn't you yackety-yack? couldn't they yackety-yack?	couldn't I be yackety-yacking? couldn't you be yackety-yacking? couldn't she be yackety-yacking? couldn't we be yackety-yacking? couldn't you be yackety-yacking? couldn't they be yackety-yacking?
Perfect	V-ing perfect
couldn't I have yackety-yacked? couldn't you have yackety-yacked? couldn't she have yackety-yacked? couldn't we have yackety-yacked? couldn't you have yackety-yacked? couldn't they have yackety-yacked?	couldn't I have been yackety-yacking? couldn't you have been yackety-yacking? couldn't she have been yackety-yacking? couldn't we have been yackety-yacking? couldn't you have been yackety-yacking? couldn't they have been yackety-yacking?