Временная форма:
Отрицательная форма:
Общий вопрос:
Специальный вопрос:

Внизу ответ

Объяснение:

My mother played the piano at 3 o'clock

My mother wasn't playing the piano at 3 o'clock

Was my mother playing the piano at 3 o'clock

Did my mother play the piano at 3 o'clock

My mother was playing the piano at 3 o′clock yesterday.

Временная форма: Past Continous

Отрицательная форма: My mother was not playing the piano at 3 o′clock yesterday.

Общий вопрос: Was my mother playing the piano at 3 o′clock yesterday?

Специальный вопрос: When was my mother was playing the piano?

isn't it

aren't you

did they

wasn't it

won't she

were they

1.he is the strongest boy in our class

2.that cake is the worst

3.my book was more interesting than his book

4.he was the most handsome man in the family

5.his flat was bigger than his friend's

1.maths is easier than history for me

2.his backpack is lighter than mine

3.their camping stove is cheaper than ours

4.my torch is better than yours