"I am talking to you!"
Translation:Εγώ σας μιλάω!
εσάς is the long or independent or strong form of the pronoun, σας is the short or weak form.
Short forms only come before verbs, I believe, or right after an imperative (command) form of a verb.
In other cases, such as after a (non-imperative) verb or a preposition, you generally need the long form.
Thus, σ' εσάς (which sounds like *σε σας, admittedly).
Violetta, I don't quite see how you'd reach level 18 in Greek without using Greek at all. It's necessary in oder to learn the language, even if someone is taking the course for a circumstantial trip.
There are also countless comments on discussions of how to get the Greek keyboard for your PC or phone. You can find the links here https://forum.duolingo.com/comment/23799672
It very simple to see how to translate everything>
TIPS TO HELP YOU LEARN
1 Use the Drop-Down hints to help you translate. Pass your cursor over a word and a list of translations will appear. The top word/phrase is the best choice This will assure that you always have the right translation. It's the secret to success. Do not hesitate to use these as often as you need to.
2 Read the Tips & notes, on the first page of each lesson you’ll see TIPS. Click on that.
3 Always read the comments before posting. Check the heading on the page to see the sentence and its translation. Click on any blue words for more definitions.
4 If your translation is rejected you should carefully compare what you wrote with the answer given. If you do not see a mistake use the Report options at the foot of the exercise page to Report issues such as My answer should be accepted. https://forum.duolingo.com/comment/22424028
TIPS TO MAKE LEARNING EASIER + HOW TO REPORT A PROBLEM
And check out the Greek Forum here with more links.
σου is never nominative; it's genitive.
σας is either genitive or accusative.
Use σου μιλάω when you're talking to one person.
Use σας μιλάω when you're talking to several people at once (or when you're speaking politely/formally to one person).
In the accusative, it's σε/σας: σε βλέπω "I see you" (one person), σας βλέπω "I see you" (several people).