Se passer means “to happen,” “to take place,” or “to go well or badly” in French. It’s commonly used in expressions like qu’est-ce qui se passe (what’s happening?) and ça se passe bien (it’s going well) to describe events and situations.
Bien sûr is a French expression meaning “of course”, “certainly”, or “obviously”, used constantly in everyday conversation to agree, confirm, or emphasize something is clear.
Sous is a French preposition meaning “under”, “below”, or “beneath” and is used to describe position and conditions in everyday language. It also appears in common expressions and hyphenated nouns such as sous pression and sous-sol.
En plus means “in addition” or “on top of that” and is used to add extra information in everyday French. It can also show emphasis, surprise, or annoyance depending on the context.
Aussi is a French adverb meaning “also” or “too” and is used to add information in everyday speech. It also appears in comparisons (as… as) and changes to “non plus” in negative sentences.