Hello
There are also some other words that the "θα" particle drops after them:
πριν = before / προτού = before/ αφού = after / αφότου = after / μόλις = as soon as
ex. πριν έρθω = before I come
προτού έρθω = before I come
αφού έρθω = after I come
αφότου έρθω = after I come
μόλις έρθω = as soon as I come
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Vasiliki Baskou, Instructor/Director, https://learn-greek-online.com.