If you have Android >2.2, go to settings -> wireless & networks -> Internet tethering -> Wi-Fi access point, there's an option to share wifi/3G/4G/LTE through USB.
I think that the question was: how can i acces internet on my android phone if i have my phone connected to a pc on usb and the pc has internet connection.
It is what i was also seraching for ?
Thanks, Michael.