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(jié)合has to是一般現(xiàn)在時(shí),借助于does構(gòu)成否定句,后加動(dòng)詞原形have,故答案是doesn't have.

點(diǎn)評(píng) 含有be動(dòng)詞,情態(tài)動(dòng)詞或者助動(dòng)詞have/has的句子轉(zhuǎn)化成否定時(shí)在其后面加上not,一般實(shí)意動(dòng)詞的否定式,通常應(yīng)根據(jù)不同時(shí)態(tài)和人稱在實(shí)意動(dòng)詞之前加don't,doesn't,didn't等.

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