Can you speak English? (你會說英文嗎？；你可以說英文嗎？)

Can you speak English? (你會說英文嗎？)

Can you speak English? (你會說英文嗎？；你可以說英文嗎？)

Do you speak English? (你有說英文嗎？)

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Can /Do you speak English? 差一個字意思就差很大！

https://blog.english4u.net/blog2.aspx?id=1800

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