Final answer:
The correct sentence should be 'Mis abuelos viven en la misma casa desde hace dos años' which translates to 'My grandparents have been living in the same house for two years'.
Step-by-step explanation:
The sentence 'Mis abuelos viven en la misma casa por segundo años' is incorrect. The correct sentence should be 'Mis abuelos viven en la misma casa desde hace dos años' which translates to 'My grandparents have been living in the same house for two years'.
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