Questions & Answers about Jeśli tłum się zgromadzi, zamkniemy bramę.
Why is zgromadzi in the future tense when the English translation says "gathers" in the present tense?
In Polish first conditionals (real possibilities in the future), both the jeśli (if) clause and the main clause use the future tense. English uses the present tense for the "if" clause, which often tricks English speakers. Here, zgromadzi is the future perfective form of zgromadzić.
Since this lesson is about the emphatic particle aż, how could I use it in this sentence to emphasize the size of the crowd?
You can't attach the particle aż directly to a standard noun like tłum because it needs to emphasize a specific amount, number, or quantifier. To use it here, you would need to introduce a number, for example: Jeśli zgromadzi się aż tysiąc osób, zamkniemy bramę (If as many as a thousand people gather, we will close the gate).
What would the sentence mean if I used the imperfective verb gromadzi instead of the perfective zgromadzi?
Changing it to Jeśli tłum się gromadzi shifts the meaning from a completed future condition to an ongoing or general present one. It would mean "If the crowd is gathering (right now)" or "Whenever a crowd gathers", rather than "If the crowd (fully) gathers (in the future)".
Could I put się at the end of the clause, as in Jeśli tłum zgromadzi się?