1:My brother is reading an e-mail._____________ 划线部分提问2:为什么What are you doing ,Li Yan?"you"前是“are” 而不是“is”划线地方是:reading an e-mail

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1:My brother is reading an e-mail._____________ 划线部分提问2:为什么What are you doing ,Li Yan?
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1:My brother is reading an e-mail._____________ 划线部分提问2:为什么What are you doing ,Li Yan?"you"前是“are” 而不是“is”划线地方是:reading an e-mail
1:My brother is reading an e-mail._____________ 划线部分提问
2:为什么What are you doing ,Li Yan?"you"前是“are” 而不是“is”
划线地方是:reading an e-mail

1:My brother is reading an e-mail._____________ 划线部分提问2:为什么What are you doing ,Li Yan?"you"前是“are” 而不是“is”划线地方是:reading an e-mail
1、What are your brother doing?
2、you是第二人称,单复数同型,和are是固定搭配,记住就好了