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19.He has to finish the work first everyday.(否定句)
Hedoesn't have to finish the work first everyday.

分析 他每天都必須先完成作業(yè)、
他沒有必要每天先完成作業(yè)、

解答 答案:doesn't have.結合has to是一般現在時,借助于does構成否定句,后加動詞原形have,故答案是doesn't have.

點評 含有be動詞,情態(tài)動詞或者助動詞have/has的句子轉化成否定時在其后面加上not,一般實意動詞的否定式,通常應根據不同時態(tài)和人稱在實意動詞之前加don't,doesn't,didn't等.

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