Questions & Answers about شما نباید در یک اتاق نمکشیده بخوابید.
How is the compound adjective نمکشیده formed in this sentence?
It combines the noun نم (nam, meaning dampness) with کشیده (keshideh), the past participle of کشیدن (keshidan, to pull). Literally meaning "moisture-pulled", it perfectly fits the current lesson's pattern of using a noun plus a past participle to describe a resulting physical state.
Why do we use the subjunctive form بخوابید instead of the normal present tense?
The auxiliary verb نباید (nabayad, meaning must not or should not) always forces the main verb into the subjunctive mood. This is why خوابیدن (khabidan, to sleep) takes the subjunctive prefix بـ (be-).
Where is the ezafe in the phrase یک اتاق نمکشیده?
It connects the noun اتاق (otagh, room) to its adjective نمکشیده (nam-keshideh). Even though it is not written, you pronounce it as otagh-e nam-keshideh. Notice that یک (yek, a/one) comes before the noun and does not take an ezafe.
Does نباید strictly mean "must not", or can it also mean "should not"?
It handles both! Farsi does not strictly separate the strong obligation of "must not" from the advice of "should not" in the same way English does. Depending on the context and your tone, شما نباید could be a friendly piece of advice or a strict medical warning.