1. Please inform me that （of）
2. Kindly inform me that （of）
3. Be good enough to inform me that （of）
4. Be so good as to inform me that （of）
5. Have the goodness to inform me that （of）
6. Oblige me by informing that （of）
7. I should be obliged if you would inform me that （of）
8. I should be glad if you would inform me that （of）
9. I should esteem it a favour if you would inform me that （of）
10. I will thank you to inform me that （of）
11. You will greatly oblige me by informing that （of）
12. We shall be obliged if you will inform us that （of）
13. We shall be pleased to have your information regarding （on， as to； about）
14. We shall deem it a favour if you will advise us of
15. We shall esteem it a high favour if you will inform us that （of）