I have been reading this book for three days., , We have been playing volleyball for 20 minutes., , She has been cleaning a flat for more than two hours., , Peter has been swimming for half an hour., , It has been snowing since last night., , You have been waiting for the bus for 20 minutes only., , The teacher has been explaning a grammar rule since the beginning of the lesson., , Nelly and Mary have been doing the shopping since early morning., .

Present Perfect Continuous

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