Теорія:

1. Statements
Ствердження
 
Subject + was/were + V-ing.
 
ann reading.jpg
 
Ann was reading a book at 5p.m. yesterday.
 
hide-and-seek.jpg
 
The children were playing hide-and-seek in the park all the morning yesterday.
 
2. Negations
Заперечення
 
Subjectwas/were + not + V-ing.
Contractions: wasn't, weren't
 
Ann was not reading a book. = Ann wasn't reading a book.
The children were not playing hide-and-seek. = The children weren't playing hide-and-seek.
 
3. Questions
Питання
 
Was/weresubject + V-ing?
 
Was Ann reading a book? — Yes, she was.
Was Ann reading a newspaper? — No, she wasn't.
 
Were  the children  playing hide-and-seek in the park? — Yes, they were.
Were the children playing football in the park? — No, they weren't.
 
Question word + was/weresubject + V-ing?
 
What was Ann reading? — She was reading  a newspaper.
Where were the children playing hide-and-seek? — They were playing  in the yard.