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7.IsBobswimming(swim) now?

分析 Bob現(xiàn)在在游泳嗎?

解答 答案是Is,swimming.
本題考查語境中選用所給詞的恰當形式;由題干中的now判斷句中需要現(xiàn)在進行時"am/is/are+doing",Bob為第三人稱單數(shù),選用is;現(xiàn)在進行時的一般疑問句是將am/is/are 提到句首;故答案是Is,swimming.

點評 本題是要求用所給動詞的適當形式填空,解題時首先考慮句中需要的是謂語動詞還是非謂語動詞;其次,如果是謂語動詞關注時態(tài)、語態(tài)和數(shù)的變化;如果是非謂語動詞要聯(lián)系非謂語的基本用法判斷非謂語的形式.

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