Ask for information
(i) Form questions, using a wide range of verb forms
Ask for descriptions:
Could you possibly describe him to us?
Would you be able to give me an idea of what it's like?
(ii) Use a range of question types (e.g. tag questions, embedded questions), and choose appropriate forms to suit a range of situations and relationships
Ask about processes:
Tell me how the gears work on this bike, can you?
Do you think you could explain how this functions?
(iii) Use intonation appropriate for the question type
Ask for factual information in formal and informal situations:
For heaven's sake, what happened?
I'd be grateful if you could explain exactly what happened.
(iv) Realise that some questions may be seen as delicate, and preface these with appropriate introductory phrases
Prepare to ask delicate questions:
I don't want to seem rude, but I couldn't help noticing...
I hope you don't mind my asking...