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该回家了

should go home now

→ 该
phrase Rare #22,221
should go home now 该 expresses that it is time or appropriate to do something; 了 emphasizes that the time has come.
CH: 天快黑了，我们该回家了。
EN: It's getting dark; we should go home now.

我该回家了

I should go home now.

— 英国病人 (1996)

我该回家了。

I should go home now.

我们该回家了

We should go home now.

— 幸福的拉扎罗 (2018)

你该回家了

You should go home now.

— 阳光灿烂的日子 (1994)

该回家了

It’s time to go home.

— 燃烧 (2018)

该回家了,

It’s time to go home.

— 好人寥寥 (1992)