Mr smith is making sandwichea改为否定句,一般疑问句,肯定Mr smith is making sandwichea改为否定句,一般疑问句,肯定答语,否定答语
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Mr smith is making sandwichea改为否定句,一般疑问句,肯定
Mr smith is making sandwichea改为否定句,一般疑问句,肯定答语,否定答语
否定句is加not其他照抄,一般疑问句把is提前,其他照抄,