what are you busy是否正确.

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不正确.少介词.应为what are you busy with?

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正确。后面加上宾语。。例如 What are you busy with,Simon?

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错了

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错了，缺少介词

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错了，因该是what are you busy with？你在忙什么
因为be busy with是个固定短语
祝你学习进步O(∩_∩)O哈！

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不对应该是 what do you busy for?或者what are you busying for?

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+ for?

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错,busy 用法——be busy in sth或 be busy doing sth
所以，原句应为：what are you busy in? 或 what are you busy doing?

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What are you busy with ？
意思是“你在忙什么”

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不正确。you是主语，what应该是宾语，但是句中缺少及物动词，或者是缺少介词。
改成what are you busy with?就可以了，be busy with sth是一个短语，忙于。

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What are you busy doing now

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错误。句子后面应加上with或 at或 doing 或over 或about

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不正确。Are you busy?
Yes, I am. No, I amn't
I am busy in reading.将这句话变成特殊疑问句，只能变成下面这句话。
What are you busy in ?
所以这句话不正确，要么是第一个要么用第二个