I am a us citizen i am getting married in august i want my partenal grand parents to attend my wedding

I would suggest that you run this by an immigration attorney. Most attorneys offer a low cost or free initial case assessment. These matters are...

Based on the fact that you have a green card for more than 10 years, you can apply for the N-400 right away. It's unclear from the facts provided...

I came in here with b1 vissa but have fallen in love with a young lady and we are about to marry can I get a permit to stay ?

You can get married and apply for a green card. Otherwise, you will need an employer to sponsor you or you have to go back to your country.

I just want to ask if do i need to apply for a renewal of my EAD? Because its gonna expired June 24,2017.

You can send them a letter regarding the name change. You can apply for renewal of your EAD as well, while you wait for the green card.

My E-3 visa expires on July 14th - however, my LCA and appointment letter expires on July 31st - can I extend I-94 to July 31st

You need to sort this out with your company's attorney. They have all of the information regarding your immigration status.

Which is better and faster, applying as an over21 unmarried son of a green card holder or as a brother of a citizen?

The parent sponsored visa should be approved more quickly. They both confer a green card, so neither is better in terms of quality.

HOW MANY DAYS AFTER FINGER PRINTS ARE DONE?

It should be in the next few months or 120 days or more. Hopefully less but times have been longer lately.

Can I go to my home country and apply for F1 visa?

Your school is the best position to handle your case. I would ask them the best way to approach this, as they are the entity sponsoring your visa.

My I 140 is a[[roved in EB2 and the priority date is February 8, 2008, when can I apply for adjustment of status form 485?

You need to review the Visa Bulletin to determine when your priority date is...

You need to wait until your priority date is current before adjusting status. Until you adjust status, you will under the terms of the H-1B, so...