и 3 скорее всего не правильно, ​

Every pupil must study well at school.

Общий вопрос - Must every pupil study well at school? (Yes, he must. No,he mustn't.) Должен ли каждый ученик хорошо учиться в школе?

Альтернативный вопрос - Must every pupil study well at school or have much fun after school? - Каждый ученик должен учиться хорошо в школе или веселиться после школы?

Специальный вопрос - What must every pupil do well at school? Что каждый ученик должен делать хорошо в школе?

Разделительный вопрос - Every pupil must study well at school, mustn't he? Каждый ученик должен хорошо учиться в школе, не так ли?

Вопрос к подлежащему - Who must study well at school? Кто должен хорошо учиться в школе?

1 . The   girl sitting next to me has a very clever brother.He is in my class.
2. Walking into the room we found all our friends there.
3. Looking for my keys, I found a pair of glasses having been lost for months.
4. Doind the shopping, she was talking on her mobile phone.
5. Waiting for my train, I was reading a newspaper.
6. The man looking at you wants to introduce himself.
7. Being very proud, Sally will never accept your money.
8. Coming from another town, Andrew hasn't got money friends yet.