Teaching DesignGrammar: The Present Perfect Continuous Tense（Unit 5,Module Eight）Chen JingNo.2 Middle School of Yongnian County April 5th,2013Teaching DesignGrammar: The Present Perfect Continuous Tense（Unit 5, Module Eight）Analysis about teaching materialTenses are a very important grammar item in senior high school English. And the present perfect continuous tense is one of the most important part in all tenses. Its structure is
