HSK 7–9 grammar · adverb
未
未 — not, not yet (formal)
Pattern
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( ) can be left out · other words may come before, between and after
How it works
未 is the written negator matching 没(有): it denies that something has happened. It combines into 尚未 "not yet" and 从未 "never once". Note it negates completion, so 未 never takes 了.
Examples
问题至今未解决。
Wèntí zhìjīn wèi jiějué.
The problem remains unsolved to this day.
我从未见过他。
Wǒ cóngwèi jiànguo tā.
I have never met him.
Related

See it in a story
In the app, 未 is underlined wherever it appears in the stories you read, and practised with sentences from them. Free.