Learn Hardcore Greek: Θα καθαρίσω το μπάνιο αργότερα, αρκεί να βρω πρώτα τη σφουγγαρίστρα και τον κουβά. - I’ll clean the bathroom later, as long as I first find the mop and the bucket.

Breakdown of Θα καθαρίσω το μπάνιο αργότερα, αρκεί να βρω πρώτα τη σφουγγαρίστρα και τον κουβά.

Why does the sentence start with Θα καθαρίσω? What exactly does that form mean?

Θα καθαρίσω means I will clean.

A few useful points:

θα is the particle used to form the future.
καθαρίσω is the verb form built from the perfective stem of καθαρίζω (to clean).

So:

In this sentence, the speaker is talking about doing the action as a single future event: I’ll clean the bathroom later.

Why is it καθαρίσω and not καθαρίζω after θα?

This is about aspect, which is very important in Greek.

Greek often distinguishes between:

Here, θα καθαρίσω uses the perfective form, because the speaker means a completed future action: I’ll clean it.

Compare:

θα καθαρίσω το μπάνιο = I’ll clean the bathroom
θα καθαρίζω το μπάνιο = I’ll be cleaning the bathroom / I’ll clean the bathroom regularly

So in your sentence, καθαρίσω is the natural choice.

What does αρκεί να mean?