就很美式口語。What are you up to? 跟What's up? 意思接近，但用法不同，What are you up to? 是主動問別人在做什麼 ... ... <看更多>

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請問可以用what are you doing today?去問候對方你今天在幹嘛嗎感覺文法上用what have you been doing today比較順但what are you doing today聽起來 ... ... <看更多>

"Get up to + something" is a British and informal expression. It just means "do something." So "What did you get up to" means "What did you do?". ... <看更多>