Составить: общий вопрос для предложений: 1) usually we talk with our teachers in english, and sometimes in russian. 2) last weekend my sister was with her friend. 3) i'm now writing a letter to my brother. отрицательное предложение для: 1) usually we talk with our teachers in english, and sometimes in russian. по 2 специальных вопроса для предложений: 1) usually we talk with our teachers in english, and sometimes in russian. 2) i'm now writing a letter to my brother. 3) i'm cooking dinner now. 4) my friend is doing homework. 5) my father teaches at school.

Do we usually talk with our teachers in English and sometimes in Russian?
Was my sister with her friend last weekend?
Am I writing a letter to my brother now? 

Usually we don't talk with our teachers in English and sometimes in Russian. 

Why do we usually talk with our teachers in English and sometimes in Russian?
When do we talk with our teachers in English and in Russian?

When am I writing a letter to my brother?
Why am I writing a letter to my brother?

When am I cooking dinner?
For what am I cooking dinner?

What is my friend doing?
Why is my friend doing homework?

Who teaches at school?
Where does my father teaches?