شب

In a sentence

• شب بسیار آرامی بود.

  The night was very peaceful.

  Here, 'شب' refers to the nighttime, representing a specific time of the day.

• شب‌ها سردتر از روزها هستند.

  Nights are colder than days.

  In this sentence, 'شب‌ها' is the plural form of 'شب', referring to multiple instances of nighttime.

• هر شب کتاب می‌خوانم.

  I read a book every night.

  Here, 'شب' is used with 'هر' meaning 'every', describing a regular activity that occurs every night.