1. We saw John coming into his flat.
2. We saw John come into his flat.
3. We heard him singing in the next flat.
4. Tom felt Ben touching his hand.
В последнем предложении нужно: Tom felt Ben touch his hand, а не touching, потому что он дотронулся, а не дотрагивался
1. We saw John coming into his flat.
2. We saw John come into his flat.
3. We heard him singing in the next flat.
4. Tom felt Ben touching his hand.
В последнем предложении нужно: Tom felt Ben touch his hand, а не touching, потому что он дотронулся, а не дотрагивался