No, your previous work permit should have been cancelled as soon as you landed as a PR. You'd need to apply for a brand new one.I read below line on IMM 5782 E form which is for renouncing PR.
I will only be enter or remain in Canada if i meet all regular requirements for a temporary resident (Visitor, worker, student).
Question - before i landed my work permit was valid until 25/08/2018 does that help me to stay in canada anyhow?
I am so sorry to ask so many question but trying to figure out the way.