Are my below examples are giving idea of two completed actions / stated in one sentences? I just want to know are my below sentence construction are correct? And can we use Past perfect for first completed action?
e.g.
a) I went to hotel (Being in hotel) where I saw that superstar.
b) I went to office (Being in office / was in office) at that time something happened at home.
c) When she called me at home at that time I Went to Market (Being in market / was in office)
d) She changed that paper (Completed action of Changing) before principal arrived at classroom.
e) Did she call me when I was not here?
f) 5 friends went to picnic when that accident happened with them.
Are my examples are giving two completed actions / stated in one sentences? I just want to know are my above sentence construction are correct? And can we use Past perfect in above sentence?