Bonsoir j'ai un petit exercice d'anglais et je n'y arrive pas c'est pour demain donc aidez moi please

Bonsoir

1- His parents might have bought a new house in California.

2- She may go to New York next year.

3- She may be working  in her bedroom.

4- Anna could have not invited Julie to her birthday party.

5- She could be ill, that's why she stayed home yesterday.

6- They may have stolen this car yesterday.

7- His friends may want to play football with him.