Explanation
Expresses uncertainty regarding duration; 'don't know when... will end'.
Formation
いつまで + Verb (dictionary form) + のやら
Detailed explanation
The いつまで～のやら grammar point is used to express uncertainty about when something will end or finish. It is often used in situations where the speaker is unsure about when a particular state of affairs or event will conclude.
Examples
この試験勉強はいつまで続くのやら。
Kono shiken benkyou wa itsumade tsuzuku no yara.
I don't know when this exam study will end.
彼の話がいつ終わるのやら、わからない。
Kare no hanashi ga itsu owaru no yara, wakaranai.
I don't know when his talk will finish.
この雨がいつまで降り続くのやら。
Kono ame ga itsumade furitsuzuku no yara.
I don't know when this rain will stop.
コロナのパンデミックがいつまで続くのやら。
Korona no pandemikku ga itsumade tsuzuku no yara.
I don't know when this coronavirus pandemic will end.
Practice
Grammar content sourced from hanabira.org.