1. The film was so boring , but I thought it was interesting ( different from )
=> The film was quite different from what I thought it was interesting
2. He has worked for this company for ten years
=> He started working for this company ten years ago
3. Lan last visited her mother 2 months ago
=> Lan has not visited her mother for 2 months
4. It's dangerous to leave medicine around the house
=> Leaving medicine around the house is dangerous