请问"She rans much faster than her sister does."一句中的does 是必须的吗

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请问"She rans much faster than her sister does."一句中的does 是必须的吗?比较句中的助动词什么情况下

an是run的过去式,过去式不用加第三人称单数.She runs much faster than her sister does才是对的.does是必须的.这句话中的than表明这是一个比较句式,比较句的前后句子成分必须相同,这句话的完整形态是She runs much faster than her sister runs,she runs 和her sister runs的句子成分才是相同的,这里的runs可以用does代替.如果分句中动词短语很长的话后面一句话用does替代就就很简洁,这句话比较简单没有体现出来.

请问"She rans much faster than her sister does."一句中的does 是必须的吗 i run faster than A.she does B.her does C.hers D.she is She runs as faster as her sister does 这句话对吗? She runs much faster than he_____.(A.is B.was.C.does.D.did) than sing does she better friends her?连词成句 her sister does better 什么her work than before Helen swim Nancy than does faster连词成句 Helen,swim,Nancy,than,does,faster( )连词成句 Jenny likes tomatoes.Her sister does’t like them合并为一句她穿的裙子和她姐姐的一样she wears ()()skirt ()her sister does Does she like____and____very much? your,getup,than,sister,you,earlier,does,连词成句