Questions & Answers about Meddelandet är redan skrivet.
Why do we use skrivet here instead of skriven or skrivit?
In this sentence, the past participle is used like an adjective to describe the noun. Because meddelandet is an ett word, the participle must match it by ending in -t (skrivet). You would use skriven for an en word (like boken är skriven). Remember that you only use skrivit (the supine form) after the verb har (have), as in jag har skrivit (I have written).
Could I say meddelandet skrivs redan instead?
That would mean something slightly different. Skrivs is the s-passive form and focuses on the action happening right now (the message is already being written). Using är plus the past participle skrivet focuses on the finished result or state (the message is already written).
How do we know meddelandet is an ett word?
The ending gives it away! The base word is ett meddelande (a message). To make an ett word that ends in a vowel definite (the message), you just add -t to the end, resulting in meddelandet.
Why is redan placed after är?
Redan (already) is a sentence adverb. In a normal main clause, these short adverbs always go right after the first verb. So the correct word order is är redan, not redan är.