Aquest és un cas important.

This is an important case.

Breakdown of Aquest és un cas important.

• ser: to be
• un: a
• important: important
• aquest: this one

Questions & Answers about Aquest és un cas important.

Why does the sentence start with aquest?

Aquest means this and is a demonstrative adjective. It points to something near the speaker.

In Aquest és un cas important, aquest goes with cas because cas is masculine singular.

A quick comparison:

• aquest cas = this case
• aquests casos = these cases
• aquesta situació = this situation
• aquestes situacions = these situations

So aquest is there because the sentence is talking about this case.

Why is it aquest and not això?

Because aquest modifies a noun, while això stands alone.

• aquest = this
  • noun
    
    • aquest cas = this case
• això = this by itself
  
  • Això és important = This is important

In your sentence, there is a noun, cas, so Catalan uses aquest, not això.

What does the accent in és do?