A voweled رَ / رُ is generally heavy, whereas رِ is light. Begin by practicing those three forms alone.
Light rāʾ is still an Arabic rāʾ, not a different consonant. Heavy rāʾ should not be intentionally rolled many times. The point is appropriate sound quality with controlled articulation.
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Voweled rāʾ: fatḥah, ḍammah, kasrah
Tafkhīm and Tarqīq — Alif, Divine-Name Lām and Rāʾ
A voweled رَ / رُ is generally heavy, whereas رِ is light. Begin by practicing those three forms alone.
Light rāʾ is still an Arabic rāʾ, not a different consonant. Heavy rāʾ should not be intentionally rolled many times. The point is appropriate sound quality with controlled articulation.