Hello!

I'm studying english tenses and i need some help. I have some questions:

1-What is the difference between the future indefinite and will+infinitive form?

2-What is the difference between sentences: I will never get married./ I am never getting married.

3- The use of present progressive and future indefinite in clauses of time and condition- Are the two tenses both used to express a future event which depends on some external circimstances?

4-What is the difference between these sentences:

  >Yesterday I wore a red dress/ Yesterday I was wearing a red dress.

  > I lived in Geneva./ I was living in Geneva.  (is there a difference if I add something like "for a year" to each of these two sentences?)

  > A 74 bus stood just beside me./ A 74 bus was standing just beside me.

Thank you