1. Sorry.
2. I'm (so / very / terribly) sorry.
3. Ever so sorry.
4. How stupid / careless / thoughtless of me.
5. Pardon (me)
6. That's my fault.
7. Sorry. It was all my fault.
8. Please excuse my (ignorance)
9. Please don't be mad at me.
10. Please accept our (sincerest) apologies.
11. How are you?
12. How are things?
13. How's things?
14. How's it going?
15. How are you getting on?
16. How have you been?
17. What have you been (getting) up to?
18. I hope everything's okay?
19. Alright?
20. How have you been keeping?
21. Do you think it's all right to do it?
22. What do you think about (me doing that)?
23. Do you think / reckon I ought to (do it)?
24. What would you say if I (did it)?
25. Would you approve of (doing something)?
26. What is your attitude to the idea of...
27. Are you in favour of (me doing something)?
28. You are in favour of ... aren't you?
29. Do you think anyone would mind if I...
30. Do you think it would be really awful if I
31. Can you tell me...?
32. Could you tell me...?
33. I'd like to know...
34. D'you know...
35. (Got / Have you) any idea...?
36. Could anyone tell me...?
37. (Do / Would) you happen to know...?
38. I don't suppose you (would) know...?
39. I wonder if you could tell me...?
40. I wonder if someone could tell me...?
41. What do you think of...?
42. What do you think about...?
43. How d'you feel (about...)?
44. What d'you reckon (about...)?
45. What's your opinion of...?
46. (What do think about) that?
47. What are your views on...?
48. Where do you stand (on...)?
49. What would you say to... / if we...?
50. Are you aware of.....?