题目内容
【题目】My mother is swimming in the river now. (用last Sunday改写)
My mother in the river last Sunday.
【答案】swam
【解析】句意：我妈妈现在在河里游泳。把现在进行时态改成过去时态，也就是把be doing变成动词的过去式；is swimming变成swamp，故填swam。
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【题目】My mother is swimming in the river now. (用last Sunday改写)
My mother in the river last Sunday.
【答案】swam
【解析】句意：我妈妈现在在河里游泳。把现在进行时态改成过去时态，也就是把be doing变成动词的过去式；is swimming变成swamp，故填swam。