Learn Farsi: من از ماساژ گردن خوشم می‌آید، در حالی که برادرم خوابش می‌آید. - I like neck massages, while my brother is sleepy.

This is a special type of verb in Farsi called an experiencer verb. Instead of saying 'I like' or 'He sleeps,' Farsi phrases it as 'My goodness comes' (خوشم می‌آید) and 'His sleep comes' (خوابش می‌آید). The verb می‌آید stays in the 'it' (3rd person singular) form because the grammatical subject is the feeling ('goodness' or 'sleep'), not the person.

If می‌آید stays the same, how do we know who is experiencing the feeling?

The person experiencing the feeling is shown by the pronoun ending attached to the noun or adjective. In خوشم, the ـم (-am) means 'my' (so, 'I' like). In خوابش, the ـش (-ash) means 'his' (so, 'he' is sleepy).

Why is there an از (from) before 'neck massage'?

The verb خوش آمدن requires the preposition از to introduce the thing you like. You can think of the literal structure as 'From neck massages, my goodness comes.'

Why do we need من (I) and برادرم (my brother) if the endings ـم and ـش already tell us who is experiencing it?

Using the independent pronoun من and the noun برادرم clarifies and emphasizes the topic. It is like saying 'As for me, I like...' and 'As for my brother, he is sleepy...' The sentence is grammatically correct without them, but adding them makes the contrast in this sentence much clearer.