Yes, the sentence "I would have done it if you would have told me sooner" is grammatically correct but could be improved by saying "I would have done it if you had told me sooner" for clearer communication.

No. That would need to be done by a court order.

No. That would need to be done by a court order.

No. That would need to be done by a court order.

No. That would need to be done by a court order.

No, because the order is wrong. The phrase should be: "would not have done" or "wouldn't have done" instead.

No, i wouldn't have done it because they didn't ask me to. Yes, it would be correct.

No!! i would not!