【题目】改错:He is do taijiquan. __________________
【答案】He is doing taijiquan.
【解析】
句意:他在打太极拳。现在进行时的构成为:主语+be动词+现在分词,do的现在分词是doing,所以do要改为doing。故答案为He is doing taijiquan.

【题目】改错:He is do taijiquan. __________________
【答案】He is doing taijiquan.
【解析】
句意:他在打太极拳。现在进行时的构成为:主语+be动词+现在分词,do的现在分词是doing,所以do要改为doing。故答案为He is doing taijiquan.