Another example of "to us" being acceptable in English, but marked wrong in the program.

I indicated the used pronoun:

https://www.dropbox.com/s/k2baho71hreg9sp/wg1p.jpg?dl=0

This is my favorite section of the Gk tree so far, because the syntax (word order) differs from English (μου precedes the verb whereas in English the verb comes first). I also like that an accent can help to distinguish an object from a possessive pronoun.