"Before the petrol finishes."
Translation:Cyn i'r petrol orffen.
There are three ways of writing "The" in welsh. Firstly "Y" which comes before a word that begins in a consonant and a word that ends with a consonant e.g "Rhwng y byrddau"=Between the tables. "Yr" comes before a word that starts with a vowel and after a word that ends in a consonant e.g Rhwng yr eirth"=Between the bears. Finally is " 'r " which comes after a word that ends in a vowel e.g "Mae'R eirth"="The bears are". So in one sentence "Mae'R eirth yn rhwng Y byrddau yn YR ardd" =THE bears are between THE tables in THE garden. Sorry if my examples are a bit random they were the first that came to mind. Also remember that Welsh vowels are the same as English (A E I O U) but also include W and Y.
Hmm it's because "cyn i" is the phrase used for before. and cyn must come with an i. I think so anyway.