Learn Turkish: Cilt bakımı için pahalı kremler almasına gerek yok. - She doesn't need to buy expensive creams for skin care.

It is built from the verb root al (buy). First, we add the verbal noun suffix -ma to make alma (buying). Then, we add the 3rd person possessive suffix -sı (her/his buying). Finally, because the phrase gerek yok requires the dative case (meaning 'to'), we add -a, using -n- as a buffer letter: al-ma-sı-n-a. Literally, this structure means 'there is no need TO HER BUYING'.

How do we know it means she doesn't need to buy, since there is no 'o' (she/he) in the sentence?

The subject is indicated by the possessive suffix attached to the verbal noun. The -sı in almasına means 'his' or 'her' (her buying). If you wanted to say 'I don't need to buy', you would use the 'my' suffix instead: almama (al-ma-m-a).

Since the creams are being bought, why isn't kremler in the accusative case (kremleri)?

In Turkish, you only use the accusative case for specific or defined direct objects (like 'THE expensive creams'). Here, 'expensive creams' is indefinite and general—she doesn't need to buy any unspecified expensive creams. Therefore, it stays in the plain, unmarked form.

Why does bakım (care) have an -ı at the end in cilt bakımı?