error recognition
1) mrs.smith lives in Paris for ten years ,but now he is living in rome.

2) my cousins have visited the museum a few days ago

Kelas: SMA
Pelajaran: English
Kategori: grammar review
Pembahasan: 

1. Mrs.Smith lived (not lives) in Paris for ten years, but now he lives (not living) in Rome. - Past tense is used to replace 'lives' as there's an explanation that it now she isn't in Paris any longer. Meanwhile present simple is used to replace 'living' as it shows the current situation, not activity. 
2. My cousins visited (not have visited) me the museums a few days ago and they will see temples next sunday. - Past tense is used to replace 'have visited' as the time signal 'a few days ago.'