This his sister.these his brothers.改一般疑问句、做肯定否定回答,改为单数形式.

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This his sister.these his brothers.改一般疑问句、做肯定否定回答,改为单数形式.
急 ,,,
these his brothers也改一般疑问句

1、Is this his sister?yes she is.no,she isn't.
2、this is his brother.（单数）
再问：两句都要改
再答： IS this his brother? (一般疑问句） Yes ,he is. （肯定回答） No ,he isn't.（否定回答）（在学习中，英语一定要注意语法，英语的语言结构其实很简单的，看着这些句子，你自然可以举一反三了）

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