Learn Arabic (Modern Standard): أين الحفلة؟

The word أين (ayna) specifically means "where". It is the standard question word used to ask about the physical location of someone or something, just like in English.

Why is there no word for "is" in this sentence?

In Arabic, present tense sentences usually do not use a word for "is" or "are". You just put the question word and the noun next to each other. So, أين الحفلة؟ literally translates to "Where the party?".

Does the word "where" (أين) change because "party" is a feminine word?

No, it stays exactly the same! Even though the word for party, الحفلة, is feminine (which we can tell by the ة at the end), question words like أين do not change to match the gender of the noun they are asking about.

Why is it الحفلة (al-hafla) instead of just حفلة (hafla)?

The prefix الـ (al-) at the beginning of the word means "the". Without it, حفلة just means "a party". We use الـ here because we are asking about a specific event: "Where is the party?".