State whether the article is used or omitted and give examples:
1. with no existe and an unmodified noun.
2. with haber in the negative or interrogative
3. to say "a so-called"
4. With convertirse and a modified profession
5. with millon
6. with otro
Please refer to the usage and omission of articles which I provided for you in your earlier post. That should answer most of them.
(million/millon)
Sra
