Breakdown of شما نمیتوانید این فایل را رمزگشایی نکنید.
شما
you (plural)
این
this
راrâ
definite direct object marker
توانستنtavânestan
to be able to
Questions & Answers about شما نمیتوانید این فایل را رمزگشایی نکنید.
Why use the double negative نمیتوانید ... نکنید instead of just saying "you must decrypt"?
This double negative—combining the negative modal نمیتوانید (you cannot) with the negative subjunctive نکنید (not do)—creates a much stronger sense of obligation or inevitability than just using باید (must). It implies that leaving the file encrypted is simply not an option, perhaps due to a strict system requirement or absolute necessity.
How is the word رمزگشایی (ramz-goshâyi) constructed?
It is a compound noun built from two parts. رمز (ramz) means 'code,' 'secret,' or 'password.' The second part is derived from the present stem of گشودن (goshudan), which means 'to open' or 'to solve,' combined with the noun-forming suffix ـی (-i). Literally, it translates to 'code-opening,' which is the standard term for 'decryption.'
Why is نکنید (na-konid) in the subjunctive mood, and where did the usual بـ (be-) prefix go?
The verb توانستن (to be able to) acts as a modal and always forces the following main verb into the subjunctive mood. Normally, the present subjunctive takes the بـ (be-) prefix, as in بکنید (be-konid). However, when you make a subjunctive verb negative, the negative prefix نـ (na-) completely replaces the بـ (be-) prefix.
Is this "cannot not" structure purely formal, or is it used in everyday spoken Farsi?