A Quick Review For Busy People : Using In / At For Place
Just like the prepositions of time,  using  at  and in  for place are confusing.  Here are the rules to aid you in composing what you have to say :   1   You use at   to talk about:  a.      a specific place                    I was at  my friend’s house. We waited at  the bus stop for ages. Neil wasn’t at  work.  I think he’s ill. Let’s stay at  home tonight.  b.      an exact address                              She lives at   No.48 Apple Creek Street.   c.      public places or institutions    I’ll be at  the station at nine.  We met at  university in 1985.  d.      shops or workplaces He’s at  the doctor’s now.  e....