I Got laid off one year ago after my I-140 was approved. Can I go back to work for the same employe

Ping Dong

Registered Users (C)
I was laid off during waiting for my priority date after I-140 approved, and I never had a chance to file I-485. My question is: can I find a position for the same employer now and file I485 directly? Is there any expiration date for the I-140? Any suggestion will be helpful.
 
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