TSQL IF Operator results invalid column

My objective, is to select the first available address. If there isn't a AddressCity, then I should select the AddressRegion, and if there is not a AddressRegion I should select the AddressCountry.

 IF  AddressCity IS NOT  NULL
 SELECT AddressName + ' is from ' + AddressCity
 ELSE
 IF AddressRegion IS NOT NULL
 SELECT Address+ ' is from ' + AddressRegion   
 ElSE
 IF AddressCountry IS NOT NULL
 SELECT AddressName + ' is from ' + AddressCountry
 FROM DBO.Address

When I execute it, I get Invalid column name 'AddressCity'