4.Has your brother tried changing the batteries ?
5.But I can't remember having received a letter from her in the past few weeks.
But I can't remember having received her letter in the past few weeks.
6.I had tried contacting/to contact her ...
7.He has always found it difficult to understand her .
8.Everyone in the family might be afraid of hurting his feelings.
9.Perhaps it needs to be oiled.
Perhaps it needs oiling .
10.She must be busy writing the book report these days.
1.Would you mind telling me the whole story again ?
2.Their proposal is worth considering.