阅读下列材料，回答问题：

写出命题$\sqrt{x-2}+{\left(y+1\right)}^2=0$，则x=2且y=一1”的逆命题、否命题、逆否命题，并判断它们的真假．

Whose Dogs?

    Tom and his Mum walk in a street. They see a big dog and a small dog there.

    "Tom, do you know whose dogs they are?" his Mum asks.

    "Sorry, I don't know."

    "The big dog is the small dog's Mum." says the mother.

    "Oh, I know. The small dog is the big dog's son." answers Tom.