Have you been studying for the University exam?, Have you been playing video games since your childhood?, Have you been saving money for the concert for two years?, Have you been reading the book since two months ago?, Have your parents been living in Puebla for 20 years? , Have you been eating well since three years ago?, Have your friends been dancing for one hour?, Has your mother been working for 10 hours?, Have you been working in the market for 6 months?, Has your brother been studying for his exam since 3 months ago?.

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