可以用在现在时和过去时里面。例如:
Mira revealed hitherto unsuspected talents on the dance floor.
Conversely, only a minority of adults are talented musicians; even fewer are skilled composers of new, hitherto unheard works.
[1]https://dictionary.cambridge.org/zhs/%E8%AF%8D%E5%85%B8/%E8%8B%B1%E8%AF%AD/hitherto
[2]https://www.merriam-webster.com/dictionary/hitherto#examples
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