His brather had been treveling for a month Написать: общий, 2 специальных и к подлежащему. Время Present Perfect Continuous

His brother has been travelling for a month.

*общий - Has his brother been travelling for a month?

*2 специальных - Where has his brother been travelling for a month?

With whom has his brother been travelling for a month?

*к подлежащему - Who has been travelling for a month?