Learn Turkish: Yüksek dağlar küçük gölleri korur. - High mountains protect small lakes.

The root of the verb is koru- (to protect). Because this root ends in a vowel, we simply add the suffix -r to form the Aorist (Simple Present) tense. This gives us korur. The Aorist is perfect for this sentence because it states a general, timeless fact.

The subject is plural (Yüksek dağlar), so why is the verb korur instead of korurlar?

In Turkish, when a plural subject is non-human (like mountains, animals, or objects), the verb typically remains in the singular form. That is why we use korur rather than adding the plural suffix -lar to the verb.

Why does göl (lake) become gölleri here?

The word breaks down into göl (lake) + -ler (plural) + -i (accusative case). The -i suffix marks the noun as the specific direct object receiving the action of the verb korur. Even though the English translation says general "small lakes", the Turkish accusative gives it a slightly more defined feel, referring to the specific lakes found near those mountains.