The example of the children is quite clear but what about the following sentences:
1) When I turned the corner,
- I saw Madonna and Arnold's car. --> I saw Madonna and the car of Arnold?
- I saw Madonna's and Arnold's car. --> I saw the car, jointly owned by Arnold and Madonna?
- I saw Madonnas and Arnold's car. --> same meaning, but is the lack of an apostrophe correct?
- I saw Madonna and Arnold's cars. --> I saw Madonna and the cars of Arnold?
- I saw Madonna's and Arnold's cars. --> I saw the cars, all jointly owned by Arnold and Madonna?
- I saw Madonnas and Arnold's cars. --> same meaning, but is the lack of an apostrophe correct?
Thanks, this is really confusing!
BL