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最佳答案:C用现在进行时他正在藏在树后
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最佳答案:不用的,例如:he is playing basketball 回答:No,he isn't就可以了.
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最佳答案:现在进行时 现在进行时构成:主语+be+动词ing〔现在分词〕形式第一人称+am+v-ing第二人称+are+v-ing第三人称+is+v-ing定义:现在进行
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最佳答案:1.肯定句:I'mplayingbasketballwithmyfriendnow.2.否定句:I'mnotplayingbasketballwithmyfri
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最佳答案:I'm playing basketball with my friend now.I'm not playing basketball with my fri
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最佳答案:现在进行时am/is/are+being+P.P过去进行时was/were+being+P.P过去完成进行时had been being+P.PP.P表示动词的
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最佳答案:陈述句:I have already eaten lunch at home.一般疑问句:Have you ever been to Beijing?否定句:S