English on Tuesday is translated into Spanish as el martes; it is not a word-for-word translation.
If the two classes on Tuesday were a regular event, you might say in English either "She has two classes on Tuesdays" or "She has two classes on a Tuesday". As far as I can make out, for repeating events such as this, you would be able to use en martes, so "She has two classes on a Tuesday" could be translated as "Ella tiene dos clases en martes". So far on this course, I don't believe I have seen any examples of this construction.
I from Honduras.
Es correcto por que estamos hablando de 2 clases, y estamos usando un adjetivo cuantitativo que modifica al sustantivo que describe convirtiendolo asi en plural, y en este caso colcoamos CLASSES
Si fuera una clase seria CLASS
It is correct because we are talking about 2 classes, and we are using a quantitative adjective that modifies the noun it describes turning it into a plural form, and in this case we place CLASSES
No entiendo porque agunas veces veo -1 y otras 1 And I can't say the rest in spanish! But this stupid up and down vote really get me. like yours ErikM it seem to have a down vote (minus) and I can't see or imagine why - lo que has escribido es muy bueno y interesante. No soy muy fuerto en gramatica pero pensio que lo entiendo bien. Ademas nos das la traducione en ingles (pulgar por encima...trato de decir "thumb up"!) Oh mama mia - madre mia se puedo...eso esta dos anos pasados ! Siempre me ovido de leer las fechas
The reason why it should be “two classes on Tuesday” is because that would be translating the text directly. It says “dos clases el martes” the word “el” in this sentence is translating as “on” and if you take that out, then you just took out one of the words it wanted you to translate
So how would you say "she has two classes on Tuesdays" meaning she takes/teaches two classes every Tuesday as opposed to just this one particular Tuesday?
From personal experience, I've sometimes had to compare my answer letter by letter before I spot my error when I think my answer has wrongly been marked incorrect. If after doing that, you're still sure your answer is the correct one, then take a screenshot and raise a bug report with Duolingo. Instructions for doing that are at support.duolingo.com/hc/en-us/articles/204728264-How-do-I-report-a-bug-
Yep and they mean different things in different languages, at least in some contexts.
For instance, Spanish uses "en" which means "in" in places where English would use "on" or "at" such as "en vienes" "on Friday" or "en universidad" "at University".
So as they are not a native English speaker, they didn't know which preposition was used in this exercise.