17.They didn't arrive on time because they got up late.(對劃線部分提問)      
Whydidn'tthey arrive on time?

分析 他們沒有準時到達因為他們起的晚.
他們?yōu)槭裁礇]有準時到?

解答 答案:Why didn't.劃線部分是because引導的原因狀語從句,提問用疑問詞why,這里是一般過去時的否定,借助于did構成一般疑問,故答案是Why didn't

點評 對劃線部分提問要分析劃線部分在句子中的成分,即可找出恰當?shù)奶厥庖蓡栐~.疑問詞后一般疑問句語序.

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