Learn Farsi: رقصنده‌ها به سوی میدان نمی‌روند. - The dancers are not going towards the square.

The compound preposition be su-ye means "towards". It is built from be (to) and su (direction or side). To connect it to the noun meidan (square), it needs an ezafe (a short connecting vowel). Because su ends in a vowel sound, the ezafe becomes -ye, giving us be su-ye meidan.

How is the word for dancers, raghsande-ha, constructed?

It starts with the verb raghsidan (to dance). If you take its present stem raghs and add the suffix -ande (which means "someone who does an action", like "-er" in English), you get raghsande (dancer). Finally, add the standard plural marker -ha to get raghsande-ha.

Why does the negative verb nemiravand start with ne- instead of the usual na-?

When making a verb negative, the standard prefix is indeed na-. But there is a special pronunciation rule: when the negative prefix attaches directly to the continuous prefix mi-, it changes from na- to ne- to make it easier to say, giving us nemi-.

Is nemiravand translated as "are not going" or "do not go"?

It can be translated as either! Farsi uses this same present tense structure to talk about both continuous actions happening right now ("they are not going") and regular habits ("they do not go"). You have to rely on context to know which one fits best.