Are these sentences well written?

[Jua Anto]

Hello. I signed up for Japanese classes and I'm doing a word ordering exercise, but I'm not sure if I've done it well. If someone could tell me if it is right or wrong and, if applicable, correct it, I would appreciate it.

- sore wa watashi no kagi desu
- kono wa Mira-san no jisho desu
- sono wa dare no kasa desu ka
- are wa sensei no tsukue desu

 

[Stickerken]

the word after kono/sono/ano is noun (unless retracted which you'll learn later), so your 2nd and 3rd sentence are incorrect.

 

[Jua Anto]

then it would be...

- kono jisho wa Mira-san no desu
- sono kasa wa dare no desu ka

Is correct now??