Of course, it gets dark in the winter in St. Petersburg about noon.

不过,冬天的圣彼得堡中午之后就天黑了

耶鲁公开课 - 欧洲文明课程节选

Maybe you should leave before it gets too dark, so that you don't have to walk too far.

也许你该在天黑之前就动身回去了，这样你就不用走那么远了。

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Does he see me that I am still here when it's getting dark?"

他有没有看到我天黑了还在这里工作"

耶鲁公开课 - 欧洲文明课程节选

And by the time I get home, it's dark.

我回家的时候，天黑了。

中央公园的时光 - SpeakingMax英语口语达人