Always use ~んですが before asking for a favor (e.g., ...て いただけませんか).
Use ~ん です when you aren't just stating a fact, but explaining a reason for a specific situation. minna no nihongo lesson 26 renshuu c answers
For further practice, you can listen to the official audio files on the 3A Corporation Website or follow step-by-step video tutorials from creators like Bhupin Sensei pattern used in these exercises? Always use ~んですが before asking for a favor (e
Step-by-step video explanations for Renshuu B and C are available on YouTube which walk through the specific problem sets. minna no nihongo lesson 26 renshuu c answers