Breakdown of Птицы разлетелись, как только услышали странный шум.
птица
bird
странный
strange
шум
noise
как только
as soon as
услышать
to hear (perfective)
разлететься
to scatter (flying) [pf]
Questions & Answers about Птицы разлетелись, как только услышали странный шум.
How does the combination of раз- and -ся create the meaning of "scattered" in разлетелись?
The prefix раз- combined with the reflexive suffix -ся indicates a group splitting up and moving in multiple, diverging directions. Added to the base verb лететь (to fly), разлететься specifically means "to fly away in different directions."
Since разлетелись is perfective, what would the imperfective form be?
The imperfective form is разлетаться. With prefixed verbs of motion, the perfective is built on the unidirectional base (лететь) and the imperfective is built on the multidirectional base (летать). Here we need the perfective because the scattering was a single, completed reaction to the noise.
Why do we use perfective verbs (разлетелись, услышали) with как только?
как только translates to "as soon as," which usually connects a strict sequence of completed events. The first completed action is hearing the noise (услышали), which immediately triggers the second completed action of scattering (разлетелись).
Why is there no pronoun like они (they) before услышали?
Russian often drops the subject pronoun in the second part of a sentence if it refers to the same subject as the first part. Since птицы (the birds) are both doing the scattering and the hearing, adding они is unnecessary and omitting it makes the sentence flow more naturally.
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