There are two basic ways you can do this. First, you can apply (you have been there for more than the required 5 years - Fill out a form N400 from ICE); secondly, you could be adopted by your stepfather. I'd go with the N400 route as you already qualify for citizenship.
No. Neither will automatically become citizen of the other country.
Citizenship does not affect your ability to get married, only where you can live.
No, they were never a citizen; marriage to a US citizen does not automatically make you a citizen. Marriage to a US citizen allows you the a reason to apply citizenship; of which the test is a part of the process. The USA citizenship test is only one of the steps to becoming a citizen; it does not grant you citizenship if you pass it. You still have to apply for citizenship and get through the process.If you want to become a citizen and have been married and never applied for citizenship, then all you have to do now is apply. There is no requirement for you to become a citizen, just because you are married to a citizen. You never have to apply if you don't want to become a citizen. No one will force you to become a citizen just because you are married to a citizen; it is totally a voluntary process. So, if you are concerned that you've been married for 25 years or whatever and you never bothered to apply for citizenship, and now you've decidecd you want to become a citizen, don't worry there is no penalty to wating this long. it has no barring upon your status; its not illegal or anything.
No, unless you are an not a legal citizen already.
No. Only if you marry him, he will become a citizen.
Yes they retain citizenship.
No, he is no longer married to a citizen so no longer has citizen status; unless he has applied for and completed the citizenship process to become a citizen in his own right.
yes
You need to get married to a Canadian citizen or apply for a Canadian Visa to get the citizenship of Canada.
if you married your girlfriend after 3 years you will become a usa citizen. your child basically has both citizenship i believe but don't mock me.
yes. it can, but not always is.
Which country did you get married in? If in the US, your husband has the choice of either becoming a full US Citizen or the option of holding dual citizenship.