Breakdown of Модератор читает каждый комментарий и добавляет лучшие мысли в общий список.
Questions & Answers about Модератор читает каждый комментарий и добавляет лучшие мысли в общий список.
Комментарий is a masculine inanimate noun. In the sentence it is the direct object of читает, so it must be in the accusative case.
For inanimate masculine nouns, the accusative singular form is identical to the nominative singular. So:
- Nominative: комментарий
- Accusative: комментарий (same form)
Каждый is an adjective-like pronoun that must agree with комментарий in gender, number, and case:
- Masculine singular nominative: каждый
- Masculine singular accusative (inanimate): каждый (same form)
So каждый комментарий is accusative (object of читает), but it looks like the dictionary form because of this nominative/accusative overlap for inanimate masculine nouns and agreeing adjectives/pronouns.
Both are possible, but they emphasize slightly different things:
каждый комментарий = every comment (one by one)
Focuses on individuality and completeness: not a single comment is skipped.все комментарии = all the comments
Focuses more on the whole set as a group.
In this sentence, каждый комментарий emphasizes that the moderator reads each individual comment, without exception. It gives a stronger sense of thoroughness than все комментарии would.