Όταν το σπίτι είναι κενό, έχει τόση ησυχία που συγκεντρώνομαι εύκολα.

When the house is empty, there is so much quiet that I concentrate easily.

Breakdown of Όταν το σπίτι είναι κενό, έχει τόση ησυχία που συγκεντρώνομαι εύκολα.

• είμαι: to be
• το σπίτι: the house
• έχω: to have
• που: that

Questions & Answers about Όταν το σπίτι είναι κενό, έχει τόση ησυχία που συγκεντρώνομαι εύκολα.

What does Όταν mean here, and why is it followed by the present tense είναι?

Όταν means when (in the sense of “whenever / every time that”).

In this sentence:

• Όταν το σπίτι είναι κενό = When(ever) the house is empty

Greek uses the present tense after Όταν when talking about a general, repeated situation or habit, just like here: every time the house is empty, it’s quiet and I can concentrate.

Compare:

• Όταν το σπίτι είναι κενό, συγκεντρώνομαι εύκολα.
  When the house is empty (in general), I can concentrate easily.

For future situations, Greek often still uses the present after όταν, even though English uses the future:

• Όταν το σπίτι είναι κενό, θα συγκεντρωθώ εύκολα.
  When the house is empty, I will concentrate easily.

So the present είναι after Όταν is normal and expected.

Why do we say το σπίτι with the article το? Could we just say σπίτι?

Greek uses the definite article much more often than English.

• το σπίτι = the house (usually a specific, known house – often “my/our house” in context)

In many contexts where English would say “when the house is empty” or even “when home is empty”, Greek still prefers το σπίτι with the article.

You could say όταν σπίτι είναι κενό, but that sounds unnatural and incomplete in standard Greek. Without the article, is more like “home” in some set expressions: