Questions & Answers about Suda yeni bir bakteri keşfedildi.
How is the passive voice formed in keşfedildi?
The active verb is keşfetmek (to discover), which uses the helper verb etmek. To make it passive, we add the suffix -il to the consonant-ending root. Because -il starts with a vowel, the t in et softens to a d through consonant mutation, making it edil. So, keşfetmek becomes keşfedilmek (to be discovered), and finally we add the past tense -di.
Where does the f in keşfedildi come from, if the root noun is keşif (discovery)?
Keşfetmek is a compound verb made from the noun keşif and the helper verb etmek. When these two words merge, the narrow vowel i in the second syllable of keşif drops out, leaving keşf-. This is a common rule called vowel dropping, which happens with many two-syllable loanwords when they are combined with helper verbs like etmek or olmak.
Why is it yeni bir bakteri instead of bir yeni bakteri?
In Turkish, when an adjective modifies a noun that has the indefinite article bir (a/an), the adjective almost always comes before bir. The natural pattern is [Adjective] + bir + [Noun]. Saying bir yeni bakteri would strongly emphasize the number, sounding like you are counting exactly one new bacterium rather than just describing it.