Утворіть форму множини наступних іменників. a subject, a book, a class, a dictionary, a shelf, a grown-up, a doctor, a nurse, a man, a tooth, a boy, a city, a lesson, a party.

Subjects
Books
Classes
Dictionaries
Shelves
Grown-ups
Doctors
Nurses
Men
Teeth
Boys
Cities
Lessons
Parties