"Αυτή η φούστα είναι ακριβή."

[whitelaughter]

Why is "This is an expensive skirt." incorrect?

[troll1995]

This is an expensive skirt. translates to "αυτή είναι μια ακριβή φούστα", which makes αυτή the sentence's subject and μια ακριβή φούστα the sentence's predicate, whereas in Αυτή η φούστα είναι ακριβή, αυτή η φούστα is the subject and ακριβή the predicate.

[Giorgio182480]

Could this also mean "the shirt is accurate"? Not that this makes a lot of sense, of course.

[mizinamo]

No - then the ending would be slightly different: αυτή η φούστα είναι ακριβής.

"accurate" is ο ακριβής - η ακριβής - το ακριβές (two endings); "expensive" is ο ακριβός - η ακριβή - το ακριβό (three endings).

The adverbs are ακριβώς "exactly" and ακριβά "expensively".

[Giorgio182480]

Ευχαριστώ!