「先至」

(pos:副詞)
<explanation>
yue:用嚟連接兩個事件，指前面事件發生咗，跟住至會到後面嘅事件（放喺第二句子句入面，該句如果有主語的話，要加喺主語之後）
eng:not until; only when; used to connect two events to indicate that the first event needs to take place before the second event; note that the word has to be inserted to the second clause, and must be after the subject if present
<eg>
yue:佢嚟，我先至走。 (keoi5 lai4, ngo5 sin1 zi3 zau2.)
eng:I'll leave only when he comes.
<eg>
yue:你睇清楚先至做啦！ (nei5 tai2 cing1 co2 sin1 zi3 zou6 laa1!)
eng:Hey, look carefully before you start working on it.
----
<explanation>
yue:指前者係後者嘅先決條件
eng:in order to; so that; used to indicate that the former event is the pre-requisite of the latter event
<eg>
yue:#先至得 (sin1 zi3 dak1)
eng:for something to be okay; it has to be ...; added after a strong suggestion stating that something is a must
<eg>
yue:你要講清楚，我先至明㗎。 (nei5 jiu3 gong2 cing1 co2, ngo5 sin1 zi3 ming4 gaa3.)
eng:You have to explain it clearly in order for me to understand.