I'm not sure when we should learn this particular word, but I will say that it would be helpful to have some of the words we learned earlier repeat into these lessons more often. It seems like the Spanish course implements that, but I know this course is newer and really do appreciate everyone who is working on making this Greek course a reality!
I am agree with you. I'm Russian native, and if I had not learned such words in English, how would be able to understand this Greek course now? And yes, it helps to understand the order of words in a sentence. I need it already now, because I want to learn not only the basics. Of course, you can just learn words: γάτα, μαθητής κτλ. But it's not even interesting.
P.S. I want to add: for example, I now use a program for learning the languages Abbyy Lingvo. It has a tables that contain all forms of words (e.g. verb forms). And the parts of speech written there in Greek. Want - not want, but need to know:))
It certainly does. If you don't know this terminology, what happens when you want to ask questions about Greek syntax? You're reliant on your teacher also speaking your own native language. Now if your native language is English, you'll probably get away with it; but it's a shame that too few of us realise the privilege we've lucked into by being born in an English-speaking environment.
Tracing the etymology of words is one of the great bits of learning Greek and the vocabulary in this section is really good for that (and thus helping cement my shaky grasp of the alphabet). I can see it might not appeal if etymology is not your thing but you can now choose not to do this section in the revamped DL. Duolingo team, please leave it in for people like me!
This is my favourite lesson so far. It gives learners idea of the origin of words which we learned in our literature and language classes in school. It is super interesting and informative. Besides, when you are learning a new language it is good to know what is a noun and what is an adjective and how to name it in the target language.