Maybe... I depends on if the perfective or the imperfective verb is used here. In this instance they seem to differ only by stress:
мы узнаем - perfective (узнать)
мы узнаём - imperfective (узнавать)
However, I think the DuoBot pronunciation is for the imperfective and I would have thought (but am terrible with aspect) that the perfective would be the one to use here. Unless (maybe) we're to take this to mean we will start to learn how to do it, but the learning will be an ongoing process?
I don't know what I'm talking about...
No, here's just a mistake in this task.
Мы узнАли - (present perfective and past perfective) - we learned; we have/had learned
Мы узнАем (future perfective) - we will know, we will learn; we will have learned
Мы узнавАли (past imperfective) - we was learning; we learned.
Мы узнаЁм (present imperfective) - we are learning
Мы будем узнавАть (future imperfective) - we will be learning
«Узна́ть» refers to obtaining knowledge: 'to learn, to find out'.
If you want to say you’ll have knowledge by tomorrow, you should use «знать». Because «знать» is an imperfective verb, it forms its Future tense differently: with the verb «быть» in the relevant form + the infinitive.
So, "Tomorrow we'll know how to do it" is «За́втра мы бу́дем зна́ть, как это де́лать».
That reply seems unfairly harsh. I actually had the same thought process, and I think it's a difficult distinction as "I will know" and "I will learn" can be used in very similar contexts in English.
Of course, I understand the point of the learning exercises, I just don't think any question from a Russian learner should be criticized.
I am pretty sure you have no idea what we are talking about. I know, that these are different verbs, but in future they are totally interchangable without losing any sense. That's the point and not the difference of the verbs. "I am going to" and "I will" are obviously different, but considering future they are interchangable both in everyday life and in your course from Russian to English. So are "мы узнаем" and "мы будем знать". Or give me some examples, where you can't substitute one for another.
Interchangeability is not the point. The meaning is. Узнаю is an independent verb with a lot of uses as well, such as:
- Давай я завтра узнаю в офисе.
- Если он узнает, что мы не уезжали, будут вопросы.
The first does not allow "буду знать" at all, the second formally lets you do it but the result sounds weird.
Our course of English allows pretty crap Russian, which we do not tolerate here as easily. The English sentences in the topic title says "learn", and that's what we expect. If the sentence said "are going to know", it would be a different story. But it does not.
If I understand correctly the difference between perfective and imperfective, "будем знать" means we don't have the knowledge now, but tomorrow we will have and will continue to have it, whereas "узнаем" means that at some point tomorrow we will acquire the knowledge. "Будем знать" is an ongoing thing, "узнаем" isn't. In English, "we'll know" is also a continuing thing, whereas "we'll learn" is something that happens once, therefore the translation here is correct and yours isn't.
By the way, I made the exact same mistake the first time on this question.
That's not a mistake, these two forms are totally interchangable in Future Tense in Russian. All the grammatical nuances mean nothing since these forms mean absolutely the same thing. In every sentence, where you use "будем знать", you can absolutely without losing any meaning use "узнаем" instead and vice versa. There is no need of ongoing or not ongoing, if the meaning remains the same. And in Russian it is the same, I assure you.
"Узнать"(present), "узнал (past single) /узнали (past plural)", "буду узнавать (future single) / будем узнавать (future plural)" is also an often used phrase for definition a stranger in a crowd. For example:
You are talking to someone on the phone:
-- Let's meet tomorrow at the metro station - Давайте (/давай) встретимся завтра у станции метро
-- How will I recognize you? - Как я вас (/тебя) узнаю?
-- I'll be there with a red sports bag - Я буду там с красной спортивной сумкой.
Because it’s a translation of a different sentence, «Завтра мы будем знать, как это делать».
- узнать is ‘to get to know, to learn’ (future, 1 person plural form is мы узна́ем),
- знать is ‘to know’ (future, 1 person plural form is мы бу́дем знать).
Duolingo generally wants you to be as literal as possible:
- Tomorrow we will learn how to do it. = Завтра мы узнаем, как это сделать. (Active voice is to be translated with a normal active voice.)
- Tomorrow we will learn how it is done. = Завтра мы узнаем, как это делается. (Since Russian lacks a full-fledged passive voice, passive voice is to be translated with reflexive verbs, indefinite-personal sentences or passive participles.)
Of course, in real life you can use these sentences interchangeably. But Duolingo tries to teach you grammar, so that's why it doesn't generally accept sentences if the grammar is too different.