subject and indirect questions
politely ask the directitions to go to the Cosmovitral to a stranger
example: Excuse me, could you please tell me how I can get to the Cosmovitral?
politely ask your parents for permission to go to a party tonight
example: Mom, I want to know If you can let me go to the party tonight
politely ask for a vacancy to apply for a job
Could you please let me know when there is a vacancy in your company so that I can apply for it