Learn Romanian: Băiatul fuge pe plaja caldă. - The boy runs on the warm beach.

In Romanian, the word for "the" (the definite article) attaches to the end of the noun instead of coming before it as a separate word. For masculine nouns ending in a consonant like băiat (boy), we add the ending -ul to make băiatul (the boy).

I thought the word for "runs" was aleargă. Can I use that instead of fuge?

Yes, you can! Aleargă comes from the verb a alerga (to run for exercise or sport). Fuge comes from a fugi, which originally means "to flee" or "to run away." However, in everyday Romanian, people frequently use fuge simply to mean running or moving fast. Both are perfectly fine here.

Why does the word for beach, plajă, end in an "a" here (plaja)?

This is another example of "the" attaching to the end of a noun. For feminine nouns that normally end in -ă (like plajă), that ending changes to an -a to mean "the". So, plajă is "a beach", and plaja is "the beach".

Why does the adjective caldă come after the noun, and why doesn't it have "the" attached to it too?

In Romanian, descriptive adjectives almost always come after the noun. When saying "the warm beach," the article "the" only attaches to the first word in the group. Since the noun plaja comes first, it gets the article, and the adjective caldă just follows it in its standard feminine form to match the feminine noun.