Location and Direction (la, în, pe)
Prepositions connect words to show location, direction, or origin. In English, we say "in the house" or "to the school." In Romanian, there is an important rule to remember: when a general noun follows most prepositions (like în, la, pe, and din), it drops its definite article. For example, școala (the school) becomes școală.
Use la to mean "at" a location or "to" a destination:
For position, use în for "in" or "inside", and pe for "on":
Origin (din)
When talking about where someone is coming from or stepping out of, use din (from / out of). You will often use this with the verb a veni (to come).
You can also use din to describe where something is permanently located, linking a noun to its origin:
Transportation and Accompaniment (cu)
To say you are traveling "by" a certain type of vehicle, or doing something "with" someone, use the preposition cu (with).
Important exception: Unlike the prepositions above, nouns following cu keep their definite article. For example, "car" is mașină, but "by car" is cu mașina.
Putting It Together
Once you know these prepositions, you can easily combine them to describe a complete path of movement in a single sentence.