Learn Farsi: فردا میام بازار. - Tomorrow I'm coming to the market.

میام is the spoken, colloquial form of the present tense verb می‌آیم (I come / I am coming). In everyday speech, Iranians heavily contract verbs, and the formal -آی- sound often shrinks down to a single -ا- sound.

The sentence starts with فردا (tomorrow), so why does it use the present tense verb میام instead of the future tense?

Just like in English when we say 'Tomorrow I am coming', Farsi frequently uses the present tense for future actions that are planned or certain. Using the true future tense like خواهم آمد sounds very formal and is rarely used in everyday conversation.

Where is the word for 'to' before the market (بازار)?

In formal written Farsi, you would see the preposition به (to) right before بازار. However, in everyday spoken Farsi, the preposition indicating a destination is almost always dropped when it follows common verbs of motion like coming or going.

Is it wrong to leave out the word من (I) at the beginning?

Not at all! Because the verb میام ends with the first-person suffix -م, it is completely clear who is doing the action. Adding من is not wrong, but dropping it is much more natural in Farsi unless you specifically want to emphasize that you are the one coming.