How long have you been dancing today?为什么要加been!而T

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/04/30 03:10:00

How long have you been dancing today?为什么要加been!而T
he Greens have lived in china since 2010!不用加been?

have/has been doing
这是现在完成进行时再答：具体怎么用，要结合具体语境的，并不是所有的都适用^_^
再答：你说的第二句如果要加been，那就成被动语态了，句意不通啊
再问：那How long have you been dancing today?加been是因为被动语态吗？可不可以改成how long did you dance today？
再答： How long have you been dancing today?这句中been不是被动语态，被动语态基本形式应该是be done，原句中明显是doing
再答： How long did you dance today?虽然语法不构成错误，但与现在完成进行时相比就不够纯正，显得水平也不够高，不管怎么说要以高要求要求自己嘛^_^
再答：现在完成进行时这个时态也不是特别常用的，有兴趣了解一下就好了〜
再答：

再问：那么第二句可不可以how long have you dance today？
再答：不行啊，have done 是现在完成时的基本形式，你要用的话dance要用它的过去分词danced^_^
再问：那把dance改为daced了？
再答： danced 就对了
再问：那个句子就可以了吗？
再答：句子是对的，但、说过了哈要结合具体语境找最合适它的时态
再答：好评吧^_^

How long have you been dancing today?为什么要加been!而T how long have you been dancing today? How long have you been in class today?怎么翻译? ---How long have you been in the class today?-----_________. how long have you been studying为什么后面要加ing "How long have you been How long have you been living in China?为什么要用been,living是延续性动 how long did you skate today?和how long have you been skating 英语翻译How long did you skate today?How long have you been skat How long have you been 为什么加suffering from a headache不用suffer How long have you been skating? how long have you been playing basketball ?