زباله‌ها توسط همکارهای من در این مرکز تفکیک می‌شوند.

Questions & Answers about زباله‌ها توسط همکارهای من در این مرکز تفکیک می‌شوند.

Why use tavassot-e instead of be vasile-ye for by my colleagues here?
The word توسط (tavassot-e) translates to by and is the most natural choice for human agents. While you could technically use به وسیله (be vasile-ye), that phrase literally means by means of and is much better suited for tools, machines, or inanimate objects rather than people doing the action.
Why is the verb plural (mi-shavand) when the English translation says garbage is?
In English, garbage is usually an uncountable singular noun. In Farsi, the noun زباله (zobāleh) is frequently pluralized as زباله‌ها (zobāleh-hā) to refer to general trash or multiple pieces of garbage. Because the subject is plural, the passive verb می‌شوند (mi-shavand) must also be plural to agree with it.
How was the passive verb tafkik mi-shavand formed in this sentence?
The active compound verb is تفکیک کردن (tafkik kardan), meaning to sort or to separate. To change a compound verb into the passive voice, you keep the non-verb part (تفکیک) and replace کردن with the verb شدن (shodan), which means to become or to be. Here, it is conjugated in the present tense for they to match the plural garbage.
Could I say hamkār-ān-e man instead of hamkār-hā-ye man for my colleagues?
Yes, you absolutely can. Using the ان (-ān) plural suffix for people to make همکاران من (hamkār-ān-e man) is perfectly correct and sounds slightly more formal. However, using the standard plural suffix ها (-hā) for people, as seen here, is very common in everyday speech and casual writing.

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