Q: How i can use my macbook wifi internet's by my iPhone ?

If you have a Mac connected to the internet via ethernet and want to broadcast a wi-fi signal to your iPhone, the following 2 things may help:

http://support.apple.com/kb/PH13855

http://computers.tutsplus.com/tutorials/quick-tip-use-your-mac-as-a-wi-fi-hotspo t-and-more--mac-46462

On the other hand, if you want to share your phone's cellular data connection with your Mac, the following may help (but your cellular provider and data plan must support it): http://support.apple.com/kb/HT4517