Теперь, когда гроза давно прошла, мокрый порт кажется спокойным и тихим.

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Breakdown of Теперь, когда гроза давно прошла, мокрый порт кажется спокойным и тихим.

• тихий: quiet
• спокойный: calm
• когда: when

Questions & Answers about Теперь, когда гроза давно прошла, мокрый порт кажется спокойным и тихим.

Why does the sentence start with Теперь (“now”) but then use the past tense прошла (“has passed / passed”)?

In Russian it’s very natural to combine a present-time adverb like теперь (“now”) with a past tense verb to show a contrast between the current situation and something that happened earlier.

• Теперь focuses us on the situation now.
• когда гроза давно прошла literally: “when the storm long ago passed” = “now that the storm has long since passed”.

So the structure is:
Теперь, когда X уже произошло, Y…
“Now that X has already happened, Y…”

English often uses a present perfect (“has passed”), but Russian simply uses the past tense for a completed action: гроза прошла.

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What is the role of когда here? Is it a question word or a conjunction?

Here когда is a subordinating conjunction, not a question word. It introduces a time clause:

• когда гроза давно прошла = “when the storm has long since passed / now that the storm has long since passed”.

So the structure is:

• Main clause: Теперь … мокрый порт кажется спокойным и тихим.
• Subordinate clause: когда гроза давно прошла

The subordinate clause describes the time/situation in which the main clause is true.

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