That's right. The phrase το όνομά μου should have two accents.
Duo's sentence with το όνομα μου is a misspelling born of the fact that sentences are created by picking words that are taught in the course, and that wordlist only contains the base form όνομα and not the form όνομά that is used when an unstressed possessive follows.
Course maintainers know about this and I imagine that if a second version of the course happens at some point, this is one point that they will think about how to address.
α+υ and ε+υ are two combinations of vowels that unless 1) the first vowel (α or ε respectively) is stressed (άυ - έυ) or 2) the υ -stressed or not- has diaeresis upon it (αϋ/αΰ - εϋ/εΰ), the υ acts as a consonant and they are pronounced together as "av" or "af" and "ev" or "ef" respectively. When this happens, if the syllable where the combination is in, is stressed, the accent always is upon the υ - αύ/εύ. E.g. αύριο [avrio] (tomorrow)
αυ/αύ is "av" and ευ/εύ is "ev" when: 1) they are followed by a vowel (α, ε, η, ι, ο, υ, ω) or 2) they are followed by a voiced consonant (β, γ, δ, ζ, λ, μ, ν, ρ and the combination σμ [it's pronounced zm] e.g. ναύαρχος [navarchos] (admiral), ευαισθησία [evesthisia] (sensitivity), αυλή [avli] (yard), αλεύρι [alevri] (flour), έναυσμα [enavzma] (starting signal/tinder [figurative])
αυ/αύ is "af" and ευ/εύ is "ef" when: 1) they are followed by a voiceless consonant (θ, κ, ξ, π, σ, τ, φ, χ, ψ) 2) they are at the end of a word. e.g. αυτό [afto] (this), εύκολος [efkolos] (easy), παύση [pafsi] (pause), εύστροφος [efstrofos] (quick-witted), ταυ [taf] (tau - the 19th letter of the Greek alphabet), ευ [ef] (well [archaic]).
Love this explanation, I wish they would explain like this when you are learning and show the pronouncements in English that way you would understand what the Greek words sound like easier and then I wouldn't have to keep looking on the posts for further explanations? Thank you.
In a previous question the phrase was 'το ονομα μου δεν ειναι αυτό', and one of the correct solutions was, "that is not my name". However, in this question, using the word "that" in "that is my name", was wrong. Does αυτό mean 'this' and 'that', or is there another word for 'that'? Thanks :)
Prastibria's question was exactly mine just now, so I came here. Thanks for the response. But if εκείνος is required to say "that", can you say why it's different when there is a negative with the verb? Or is that an error for 'το ονομα μου δεν ειναι αυτό' also? (In that case, DL needs a correction there.)
My previous answer was too general and I'm sorry about that. The general rule is that αυτός= this and εκείνος=that but in fact the usage of "εκείνος-η-ο" is not as frequent as that of the english "that".
-You can use "αυτός" in cases that are not purely demonstrative (you are not pointing at something). In this example "αυτό δεν είναι το όνομά μου" can mean both "this/that....". If you want to emphasise the distance then you can say "εκείνος-η-ο". Personally I would insist on "αυτός-ή-ό".
-Αυτός εκεί and εκείνος εκεί can be used interchangeably.
I hope I haven't confused you :)
Thanks. No, I'm not confused. But it still leaves open the question Prastibria (and I) were wondering about: namely, is "that is my name" an appropriate translation for the given Greek here? Because that is what I used, and "that" would be used more often in this English sentence than "this" would, and what you say would indicate that "that" would be acceptable. It's good to know about the commonality of the two Greek words, but it's the commonality of the English words that's more pertinent for a translation, since the two are so very close.
το όνομα "the name" has το as the definite article "the"- you can't move it somewhere else.
(Remember that Greek uses the definite article with possessives: το όνομά μου "my name", literally "the name my".)
το before a verb would be the short form of a direct object pronoun (e.g. το ξέρω "I know it") -- but είναι doesn't take a direct object.
Part of the confusion may come from English using "this" both for the demonstrative pronouns (that stand alone, e.g. "this is a book") and the demonstrative determiner (that comes before a noun, e.g. "this book is blue").
The pronoun is simply αυτός, αυτή, αυτό in Greek, but the determiner is αυτός ο Χ, αυτή η Χ, αυτό το Χ.