Jul 18, 2019 - 05:53 AM
Here "dies" is used as a general demonstrative adjective meaning "this", as the opposite of "das = that".
"Dieser" would also be possible, in this case it would be a bit more specific as in "this one" is my passport, and not that one...
It is often used before the verb "to be", as in:
You can always go back to tutorial #3 if you want to review this concept.
Keep up the good work,