6 'Who should I turn to for help?' he asked.
('Mình nên nhờ ai giúp đỡ đây?,' anh ấy hỏi.)
 He had no idea who to turn to for help.
  Anh ấy không biết nên nhờ ai giúp đỡ.

7 'Mum, when should I turn off the oven?' Mai asked her mother.
('Mẹ ơi, con nên tắt lò nướng khi nào ạ?' Mai hỏi mẹ bạn ấy.)
 Mai asked her mother when to turn off the oven.

8Where should we park our bikes?' asked Phong and Minh.
('Chúng tớ nên để xe đạp ở đâu?' Phong và Minh hỏi.)
Phong and Minh couldn't decide where to park their bikes.

9 'Should we call her now?' he asked.
('Chúng ta có nên gọi cho cô ấy bây giờ không?' anh ấy hỏi.)
He was not sure whether to call her then.

10'What should we do to make Linh feel happier?' they wondered.
('Chúng ta nên làm gì để giúp Linh cảm thấy vui hơn?' họ phân vân.)
 They wondered what to do to make Linh feel happier

6. He asked who turn to for help

7. Mai asked her mother when to turn off the oven

8. Phong and Minh asked when to park their bikes

9. He asked whether to call her then

10. They wondered what to do to make Linh feel happier

S + reporting V + (O) + wh-word/ whether + to - inf + ...