С,за ранее напишите за образцом: he is a good pupil. is he a good pupil? he isn`t a good pupil. 1) my parents are happy. 2) his brother is four. 3) sam and jane are cousins. 4) her uncle is strong. 5) kate is my sister.

My parents are happy.   2) His brother is four.  3) Sam and Jane are cousins.
Are my parents happy?   Is his brother four?     Are Sam and Jane cousins?
My parents aren't happy  His brother isn't four.  Sam and Jane aren't cousins.     

4) Her uncle is strong.        5) Kate is my sister. 
    Is her uncle strong?            Is Kate my sister?
   Her uncle isn't strong.          Kate isn't my sister.