This means that it was not until a certain trigger event took place that another action/situation occurred.
ex#584 We usually say えっ for うぇ Eh.
ex #3568 should end with きづいた (気づく)
can you post simple example sentences
This grammar point is listed in the Shin Kanzen Master N2 Grammar book (pg.16).
jisho.org list the second definition of Hajimete as: only after...is..; only when..do you after the te form of a verb. I am finding it confusing and like Majorie said could you please list some simple example sentences. Thanks