If you are an alien (not a U.S. citizen), you are considered a nonresident alien unless you meet one of the two tests described next under Resident Aliens. "
我能不能算是nonresident alien?
IRS里对nonresident alien的相关内容还有:
"Nonresident Spouse Treated as a Resident
If, at the end of your tax year, you are married and one spouse is a U.S. citizen or a resident alien and the other spouse is a nonresident alien, you can choose to treat the nonresident spouse as a U.S. resident. This includes situations in which one spouse is a nonresident alien at the beginning of the tax year, but a resident alien at the end of the year, and the other spouse is a nonresident alien at the end of the year.
多谢!