زیرا

In a sentence

• من به مدرسه آمدم زیرا که باید ریاضی بیاموزم.

  I came to school because I need to learn mathematics.

  In this sentence, 'زیرا' introduces the reason for the main action, providing the cause or purpose.

• او دیر رسید زیرا که ماشینش خراب شده بود.

  He arrived late because his car had broken down.

  'زیرا' is used to explain the rationale or circumstance leading to the stated outcome.

• زیرا که باران می‌بارد، چتر استفاده میکنم.

  I use an umbrella because it is raining.

  Here, 'زیرا' connects the action with its immediate reason or necessity.