wot are you on about a legal alien
the legal alien had just got his Citizianship for the USA.
Get on a very long waiting list to get your green card. You wouldn't be an alien if you were legal
Can a legal alien live in USA without a passport.
If by "legal alien" you mean a "resident alien" (i.e., a foreigner with permission to live in the United States) and by "alien" you mean any alien, whether legal or illegal (undocumented), then the answer is yes. Generally, there is no citizenship requirement for marriage in the United States. What effect the marriage will have on the immigration status of the parties involved is another question.
If you have permission by the government to enter the country (for visit, work, school, etc...) then you are a LEGAL alien If you DO NOT have permission by the government to enter the country, then you are an ILLEGAL alien
There is not any way for an illegal alien to become legal except through application to the government. Age and time in the country are not an automatic way to become legal.
A legal alien someone that is living in a US that has a card saying they can live in the U.S. You can go and get a card that can supports this.
No. Legal alien adults and native-born citizens can also work there. Illegal alien adults and minors are prohibited from working anywhere in the USA.
Yes.
no
Contact USCIS for instructions as to how to proceed in your particular case.