She was persuaded by her sister Hana to take also private lessons of English, in addition to the foreign languages taught at the Gymnasium: German, Latin and French.

There, through lectures and seminars given by direct disciples of Vilém Mathesius—Josef Vachek, Ivan Poldauf, Zdeněk Vančura and Bohumil Trnka—she gained a solid knowledge of not only the English and Czech grammatical systems, but also the principles laid out by the Prague School of Linguistics.

She graduated in 1953, in an era when the Communist regime held a tight grip over the country's economic and political system, destroying any chances for her to study English at the postgraduate level.[why?]

by defending a dissertation called Příspěvek k otázkám jazykové správnosti v současné angličtině [A contribution to questions of correctness in present-day English].

Despite her formal retirement in 1996, Libuše Dušková is still an active member of the Department of English Language and ELT Methodology, giving lectures on English grammar and functional syntax in graduate and postgraduate courses, supervising Ph.D. theses, continuing her editorial duties as editor-in-chief of Linguistica Pragensia, and doing research that is widely respected both nationally and internationally: "Some scholars are content to dig in a narrow field, revisiting again and again the patch of land in which they did their doctoral studies.