What does inna contribute to fa-inna maʿa al-ʿusri yusrā?

Supplementary Practice 18: Rhetorical Analysis of Sūrat al-Ḍuḥā and Sūrat al-Sharḥ

• It makes the clause prohibitive
• It removes the tanwīn of yusran
• Emphasis of the assertion that ease accompanies hardship
• It makes al-ʿusr a sound feminine plural