Review. 12/12/2013. Present perfect continuous -How it works. Present Perfect Continuous FORM [has/have + been + present participle] Examples: You have been waiting here for two hours. Have you been waiting here for two hours? You have not been waiting here for two hours. .
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since 9amsince Mondaysince Januarysince 1997since 1500since I left schoolsince the beginning of time
For can be used with all tenses. Here are a few examples: