I have been to Paris.

Hello,

are those sentences all right?

1) I want to express I have visited Dublin (as a tourist). Now I´m not any more in Dublin.

I know it is possible to say: I have been to Dublin.

2) And what about?: I was to Dublin./I was in Dublin. (I would prefer the first sentence.)

3) I want to express: I have spent two days in Dublin.

Could I say?: I have been to Dublin for two days.

(I´m asking because I know we usually say: I have been in Dublin for two weeks/years/days... (I know this sentence has a different meaning - it means: I´m still living in Dublin.And because there is usually the preposition "for" I´m asking about the usage in sentence number 3)

4) And what about this: My aunt has been in Paris for two months. (I mean she lives there.)

5) Is it possible to say? My aunt is in Paris for two month/since this August.

I suppose this sentence is completly wrong also in another context. In this case I only want to make sure I´m right, am I not?

6) And what about this: My aunt was in Paris for two months/since August...

I suppose this sentence is correct. However, the meaning is probably different from sentence number 4 (4- My aunt has been in Paris for two months/since August. - She is still in Paris now.). I suppose: (Sentence 6 (My aunt was in Paris for two weeks/since August...)) - This sentence is correct, however, my aunt isn´t in Paris anymore. Am I right?

Thank you for your answers Mowgli