Breakdown of Ребёнок не переставал плакать.
не
not
ребёнок
child
плакать
to cry
переставать
to stop, to cease (imperfective)
Questions & Answers about Ребёнок не переставал плакать.
Why must we use the imperfective verb плакать here?
After phase verbs (verbs that express the beginning, continuation, or end of an action), Russian strictly requires the imperfective infinitive. Because переставать (to stop) is a phase verb, it must be followed by the imperfective плакать, never a perfective verb.
Why is the phase verb itself imperfective (переставал) instead of perfective (перестал)?
Using the imperfective переставал with the negative не emphasizes an ongoing failure to achieve the result. It gives the sense that the child kept on not stopping over a period of time. A perfective не перестал would just state the factual result of a single moment in time.
Could I use заканчивал (to finish/stop) instead of переставал here?
Not really. While both are phase verbs, заканчивать is used for finishing a specific task, project, or event (like completing homework or a meeting). Переставать is the natural choice for ceasing a continuous action, natural process, or habit, like crying, raining, or smoking.
How does не переставал translate to 'would not stop' rather than just 'did not stop'?
In Russian, using the negative particle не with a past tense imperfective verb often implies a sense of resistance, reluctance, or an ongoing failure of something to happen. While 'did not stop' is also a correct translation, 'would not stop' perfectly captures that ongoing, stubborn duration.