Noun Phrase Determiners

So here's the answer to yesterday' post. The question was: what's wrong with "in his another class"?

The problem is that you can only have one determiner per sentence. Determiners are words like a, the, this, my, her, some, and any.

"Another" is a combination of "an" and "other," so there are two determiners in this sentence, and one of them has to go.

Please use English well!