1. Which particle of the inna family begins the construction?
2. Which noun is its ism, and what marks its accusative case?
3. Is the khabar a single word, clause or quasi-clause?
4. Is it overtly nominative, or is a clause in a nominative syntactic position?
5. If fronted, is the khabar a permitted locative/adverbial expression?
Apply these five questions to إِنَّ فِي الدَّارِ زَيْدًا.