Learn Farsi: دکتر در مطب برایم نسخه نوشت، اما یادم رفت قرصم را بخورم. - The doctor wrote a prescription for me in the clinic, but I forgot to take my pill.

This is an impersonal verb structure, which is the focus of this lesson. yâd means "memory", -am is the enclitic pronoun for "my", and raft is the 3rd-person singular form of "to go" (went). Literally, it means "my memory went". In Farsi, many mental and physical states are expressed as things that happen to your body or mind, rather than actions you actively do.

Why does the sentence use bokhoram (I eat) for taking a pill?

In Farsi, you do not "take" medicine or pills, you "eat" them. The verb khordan (to eat/drink) is used broadly for consuming any food, liquid, or medication. So, "take my pill" translates to "eat my pill".

Why is bokhoram in the subjunctive form here?

The subjunctive form (marked here by the bo- prefix) is used for actions that are dependent on another verb. Here, the action of eating the pill depends on the phrase "I forgot to". Whenever you link two verbs like this (similar to using "to [verb]" in English), the second verb in Farsi takes the subjunctive.

This sentence uses the -am ending three times (barây-am, yâd-am, qors-am). Are they all doing the same thing?

Yes, they are all the enclitic (attached) pronoun for "me" or "my", but they show how versatile these endings are by attaching to different parts of speech! In barây-am (for me), it attaches to a preposition. In yâd-am (my memory), it acts as the subject of our impersonal verb. In qors-am (my pill), it attaches to a regular noun to show possession.