TAG：现在完成时的标志词

谢邀。现在完成时的标志词有如下几例：already（肯定）yet（否定/ 疑问）just, before, recently, still, lately, never, ever, never, twiceon several occasionin the past/ last few days/ weeks/ months/ years(up to) these few days/ weeks/ months/ yearsthis morning/ week/ month/ yearup...

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一、现在完成时的构成 肯定句：主语+have/ has + done (过去分词)+其它 He has lived in Beijing for 10 years. 一般疑问句：Have/ Has +主语+ done (过去分词)+其它 Has he lived in Beijing for 10 years? 否定句： 主语+have/ has+ not + done (过去分词)+其它 He has not finished his homework. 二、用法： 1...

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