Мы обсудили определённый план перед началом проекта.

Breakdown of Мы обсудили определённый план перед началом проекта.

мы
we
перед
before
проект
the project
план
the plan
обсудить
to discuss
определённый
specific
начало
the beginning
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Questions & Answers about Мы обсудили определённый план перед началом проекта.

What does определённый mean in this sentence, and why is it used instead of конкретный or этот?
определённый means certain, specific, or a particular. It emphasizes that the plan was singled out or specified beforehand. конкретный focuses more on being concrete or detailed, while этот is a demonstrative meaning this. Using определённый signals that you had a distinct plan in mind, without pointing to it as “this one right here.”
Why is план in the accusative case without changing its ending?
план is a masculine inanimate noun. In Russian, the accusative singular of inanimate nouns is identical to the nominative: план. You only see a different ending if the noun is animate (e.g., брат → брата) or plural.
Why do we use обсудили (perfective) instead of обсуждали (imperfective)?

обсудили is perfective past, indicating a completed action: “we discussed (and finished discussing).”
обсуждали is imperfective, implying an ongoing, habitual, or unfinished action: “we were discussing” or “we used to discuss.” The perfective обсудили shows that the discussion was fully carried out before the project began.

Why isn’t there a preposition like о before план, as in говорить о плане?
The verb обсудить (perfective of обсуждать) directly governs a noun in the accusative without a preposition: обсудили план. In contrast, говорить requires о plus the prepositional case (говорить о плане).
Why is перед началом проекта in the instrumental case?
The preposition перед always takes the instrumental case. Therefore начало becomes началом. If you wanted to use the genitive, you’d switch to до, as in до начала проекта.
Can we change the word order, for example: Перед началом проекта мы обсудили определённый план?
Yes. Russian allows flexible word order because case endings mark grammatical roles. Placing перед началом проекта at the beginning simply emphasizes the time frame: “Before starting the project, we discussed a certain plan.”
Why is there no comma before перед началом проекта?
Because перед началом проекта is an essential adverbial modifier of time directly tied to the verb. In Russian, such phrases are not set off by commas unless they are parenthetical or you intend to highlight a pause.
How do you spell and pronounce the ё in определённый, and why is it important?
The letter ё represents the sound /jo/ and carries the stress. определённый is pronounced [op-ree-dye-LYON-nyy]. In print, ё is often written as е, but marking ё helps learners know the correct stress and pronunciation, especially in words where stress position changes meaning.