The answer usually is no. However, if the spouse has a dependency on the visa holder (e.g. has a serious sickness and needs to be taken care of), the visa holder should apply for him/her as his/her dependent spouse.
No, A US Green Card holder can't marry a Filipino and bring them back to the US. The spouse will need to apply for a Visa to be admitted into the US.
Yes, she can apply for a visa to bring her spouse to US
If they are derivatives of the original petition- yes.
If you are a Canadian citizen and your spouse is a TN visa holder, you may be eligible to apply for a TD visa, which allows you to enter and stay in the US as a dependent of your spouse. However, the TD visa does not grant you authorization to work in the US. If you want to work in the US, you would need to separately apply for a work visa that suits your qualifications and employment situation, such as an H-1B visa or an L-1 visa.
Can a US green card holder marry a filipino and petition for a spousal visa to the US
That depends on whether the foreigner actually was actually a spouse, or just a holder of a spouse visa (green card).
No
NOT SURE.
Does not matter if you are a US Green Card holder or not, when you have an Australian visitor visa, you can go there.
It all depends where the foreign national spouse lives inside or outside of the US. If the couple is not yet married and the foreign spouse is outside the US and wishes to get a marriage green card which in the US then you have to apply for a K-1 Fiance visa.
yes
If you are not a citizen of the US or Canada, you must have a US Visa to travel in the US.