不然
bùrán
not so; no
In a story
胡青不走,站在雨里说:“除非先生答应教我,不然我每天晚上都来敲门。”Hu Qing didn't leave. Standing in the rain, she said, “Unless you agree to teach me, I will come and knock on this door every night.”狐狸学字 · The Fox Who Learned to Read · HSK 5
Grammar with 不然
要不然/不然
要不然/不然 — otherwise / or else
幸亏⋯⋯,要不然/不然/要不/否则⋯⋯
幸亏⋯⋯,要不然/否则⋯⋯ — luckily …, otherwise …
幸亏
幸亏 — luckily, thanks to
幸好
幸好 — luckily

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