I've been teaching Mandarin at YouTube. (I choose this because of this symbol @, but I feel like on at the same time) The character "?" is on third tone. (this is what I said when I was teaching mandarin, and my students can understand this, even though I am not sure if it's correct. Is there any other way to express this idea to avoid using an awkward preposition?
I've been teaching Mandarin on/at YouTube -- I think 'on' is the usual.
The character "?" is inthe third tone. (Is there any other way to express this idea to avoid using an awkward preposition? -- How about 'The third tone is used for '?' ?) I got your phone number from your profile on Skype.