摘要:Ⅳ 现在进行时的构成 肯定句: 主语+ am/is/are+ doing +其他+时状. Eg: He is doing his homework now. 否定句:主语+am/is/are +not+ doing+其他+时状. Eg: He is not doing his homework now. 一般疑问句: Am/Is/Are +主语+ doing+其他+时状?Eg: Is he doing his homework now? 肯定回答:Yes,主语 +am/is/are Eg Yes, he is. 否定回答:No, 主语+am not/isn’t/aren’t Eg: No, he isn’t.

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