English verb conjugation
COULD ROCK

Regular verb: rock - rocked - rocked

Affirmation

Simple form	V-ing form
I could rock you could rock he could rock we could rock you could rock they could rock	I could be rocking you could be rocking he could be rocking we could be rocking you could be rocking they could be rocking
Perfect	V-ing perfect
I could have rocked you could have rocked he could have rocked we could have rocked you could have rocked they could have rocked	I could have been rocking you could have been rocking he could have been rocking we could have been rocking you could have been rocking they could have been rocking

Negation

Simple form	V-ing form
I couldn't rock you couldn't rock he couldn't rock we couldn't rock you couldn't rock they couldn't rock	I couldn't be rocking you couldn't be rocking he couldn't be rocking we couldn't be rocking you couldn't be rocking they couldn't be rocking
Perfect	V-ing perfect
I couldn't have rocked you couldn't have rocked he couldn't have rocked we couldn't have rocked you couldn't have rocked they couldn't have rocked	I couldn't have been rocking you couldn't have been rocking he couldn't have been rocking we couldn't have been rocking you couldn't have been rocking they couldn't have been rocking

Interrogative form

Simple form	V-ing form
could I rock? could you rock? could he rock? could we rock? could you rock? could they rock?	could I be rocking? could you be rocking? could he be rocking? could we be rocking? could you be rocking? could they be rocking?
Perfect	V-ing perfect
could I have rocked? could you have rocked? could he have rocked? could we have rocked? could you have rocked? could they have rocked?	could I have been rocking? could you have been rocking? could he have been rocking? could we have been rocking? could you have been rocking? could they have been rocking?

Interro-negative form

Simple form	V-ing form
couldn't I rock? couldn't you rock? couldn't he rock? couldn't we rock? couldn't you rock? couldn't they rock?	couldn't I be rocking? couldn't you be rocking? couldn't he be rocking? couldn't we be rocking? couldn't you be rocking? couldn't they be rocking?
Perfect	V-ing perfect
couldn't I have rocked? couldn't you have rocked? couldn't he have rocked? couldn't we have rocked? couldn't you have rocked? couldn't they have rocked?	couldn't I have been rocking? couldn't you have been rocking? couldn't he have been rocking? couldn't we have been rocking? couldn't you have been rocking? couldn't they have been rocking?