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It ...hard. The earth is covered with snow. has been snowing has snowed I ...to open the door for the last thirty minutes. have been trying have tried It is the best film that I ...have ever seen have ever been seeing Jack ...for his friends, but he ...anyone so far. has been looking has looked ...has not been meeting has not met The stadium ...closed for three months already has been has been being Hey! Who ...the window? has been breaking has broken What's the smell? Have you ...been smoking smoked The boy is out of breath. He ...has been running has run I am tired. We ...for two hours without a stop. have been walking have walked Look, what you ...My clothes are dirty. have been doing have done.