Can I work still work in the states after I485 application?

These dates do not seem right, but you can automatically get a new, unrestricted work permit about three to five months after your adjustment is filed, if you file a request for one.

When your OPT expires you are no longer authorized to work in the U.S. You will need to wait until your EAD is issued (i.e. when you file your I-485, you should also file for EAD and AP at the same time). You are authorized for employment after your EAD is issued.

After your I-526 petition is filed, the I-526 petition will be pending at USCIS for two years based on the current processing time.

The OPT has expired almost three years ago.

You can legally work in the United States after the approval of your I-526 petition and you have filed your application for adjustment of status on Form I-485, along with an application for an employment authorization document (EAD) on Form I-765. Only once the EAD is issued, which takes about 90 to 120 days, will you be authorized to work.

You may not work under the expired OPT even after I-485 is submitted. You may only resume your work when the employment authorization application (I-765), submitted with I-485, is approved.

Timing is difficult to predict with USCIS. However, when your attorney files your I-485, he or she will also file for your EAD (employment authorization). Once you have that in hand. you are authorized to work while your adjustment of status is pending.

Do you mean 2018 or 2019, not 2015? After your OPT expires you cannot continue working until the EAD card requested under your I-485 is approved. These often take more than six months, so be prepared.