semi-immigrant

Nope. You keep the green card if you come to the US within a year. I know a lady who does it for a few years.
Abandoning Permanent Resident Status
You may be found to have abandoned your permanent resident status if you:
Move to another country intending to live there permanently Remain outside of the United States for more than 1 year without obtaining a reentry permit or returning resident visa. However, in determining whether your status has been abandoned, any length of absence from the United States may be considered, even if less than 1 year Remain outside of the United States for more than 2 years after issuance of a reentry permit without obtaining a returning resident visa. However, in determining whether your status has been abandoned any length of absence from the United States may be considered, even if less than 1 year Fail to file income tax returns while living outside of the United States for any period Declare yourself a “nonimmigrant” on your tax returns http://www.uscis.gov/green-card/after-green-card-granted/maintaining-permanent-residence