English verb conjugation
COULD YOCK

Regular verb: yock - yocked - yocked

Affirmation

Simple form	V-ing form
I could yock you could yock he could yock we could yock you could yock they could yock	I could be yocking you could be yocking he could be yocking we could be yocking you could be yocking they could be yocking
Perfect	V-ing perfect
I could have yocked you could have yocked he could have yocked we could have yocked you could have yocked they could have yocked	I could have been yocking you could have been yocking he could have been yocking we could have been yocking you could have been yocking they could have been yocking

Negation

Simple form	V-ing form
I couldn't yock you couldn't yock he couldn't yock we couldn't yock you couldn't yock they couldn't yock	I couldn't be yocking you couldn't be yocking he couldn't be yocking we couldn't be yocking you couldn't be yocking they couldn't be yocking
Perfect	V-ing perfect
I couldn't have yocked you couldn't have yocked he couldn't have yocked we couldn't have yocked you couldn't have yocked they couldn't have yocked	I couldn't have been yocking you couldn't have been yocking he couldn't have been yocking we couldn't have been yocking you couldn't have been yocking they couldn't have been yocking

Interrogative form

Simple form	V-ing form
could I yock? could you yock? could he yock? could we yock? could you yock? could they yock?	could I be yocking? could you be yocking? could he be yocking? could we be yocking? could you be yocking? could they be yocking?
Perfect	V-ing perfect
could I have yocked? could you have yocked? could he have yocked? could we have yocked? could you have yocked? could they have yocked?	could I have been yocking? could you have been yocking? could he have been yocking? could we have been yocking? could you have been yocking? could they have been yocking?

Interro-negative form

Simple form	V-ing form
couldn't I yock? couldn't you yock? couldn't he yock? couldn't we yock? couldn't you yock? couldn't they yock?	couldn't I be yocking? couldn't you be yocking? couldn't he be yocking? couldn't we be yocking? couldn't you be yocking? couldn't they be yocking?
Perfect	V-ing perfect
couldn't I have yocked? couldn't you have yocked? couldn't he have yocked? couldn't we have yocked? couldn't you have yocked? couldn't they have yocked?	couldn't I have been yocking? couldn't you have been yocking? couldn't he have been yocking? couldn't we have been yocking? couldn't you have been yocking? couldn't they have been yocking?