Quando eu uso "may" expressando duvida? Pode me explicar quando uso "may" e nao posso usar "can" ao inves?

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What are the isolated form of Arabic letters used for?
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Why does the definite article "o" sometimes come before the "que"?
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¿Porqué el inglés no tiene equivalente a lo formal "Usted"?
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What’s the difference between masculine and feminine numbers in Arabic? Do both men and women say both?
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Introduction: Nayane Bremm
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How do I use the present continuous in German? For example, phrases like "I am studying German now" or "They are talking to me"
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Introduction: Khaled Aboelwafa
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الغة الانجليزية العربية