Learn Turkish: Biletleri saat altı buçukta gişeden alalım. - Let's buy the tickets from the box office at half past six.

The root verb is almak (to buy/take). To say 'let's do something', we drop the -mak and add the 1st person plural optative suffix, which is either -alım or -elim. Since the root al- has a back vowel, vowel harmony dictates we use -alım, resulting in alalım.

Why is it biletleri and not just biletler?

Biletler means 'tickets' in general. Adding the accusative case suffix -i makes it biletleri, meaning 'the tickets.' We must use the accusative case here because the tickets are the specific, known direct object of the verb alalım.

Why is there a -ta at the end of altı buçukta?

In Turkish, to say you do something 'at' a specific time, you attach the locative case suffix (-da, -de, -ta, or -te) to the time expression. The word buçuk (half) ends in a hard, voiceless consonant (k), so the suffix hardens to -ta, creating buçukta (at half past).

What does the -den suffix do in gişeden?