按要求句型转换:Mary was riding a bike at that time否定句____________一般疑问句两回答特殊疑问句

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按要求句型转换:Mary was riding a bike at that time否定句____________一般疑问句两回答特殊疑问句
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按要求句型转换:Mary was riding a bike at that time否定句____________一般疑问句两回答特殊疑问句
按要求句型转换:Mary was riding a bike at that time
否定句____________
一般疑问句
两回答
特殊疑问句

按要求句型转换:Mary was riding a bike at that time否定句____________一般疑问句两回答特殊疑问句
否定句: Mary wasn't riding a bike at that time.
一般疑问句 Was Mary riding a bike at that time?
肯定回答Yes, she was.
否定回答 No, she wasn't .
特殊疑问句: What was Mary doing at that time ?

否定句:Mary wasn't riding a bike at that time .
一般疑问句:Was Mary riding a bike at that time ?
肯定回答:Yes,she was .
否定回答:No,she wasn't .
特殊疑问句:What was Mary doing at that time ?