-If you have any questions, I will be pleased to answer them at the end of the presentation.
-there will be time at the end of the presentation to answer your questions-so please feel free to ask me anything then.
-Don't hesitate to interrupt if you have a question.
-Please feel free to interrupt me at any time.
-Please stop me if you have any questions.
-If you need clarification on any point, you're welcome to ask questions at any time.
-Can I come back to that point later?
-I will be coming to that point in a minute.
-That's a tricky question.
-We will go into details later. But just to give you an idea of...
-I am afraid there's no easy answer to that one...
-Yes, that's a very good point.
-Perhaps we could leave that point until the questions at the end of the presentation
-I think I said that I would answer questions at the end of the presentation---perhaps you wouldn't mind waiting until then.
-I think we have time for just one more question

欢迎听众(正式)
- Welcome to our company
- I am pleased to be able to welcome you to our company...
- I'd like to thank you for coming.

- May I take this opportunity of thanking you for coming

欢迎听众(非正式 )
- I'm glad you could all get here...
- I'm glad to see so many people here.
- It's GREat to be back here.
- Hello again everybody. Thank you for being on time/making the effort to come today.
- Welcome to X Part II.

受邀请在会议上致词
- I am delighted/pleased/glad to have the opportunity to present/of making this presentation...
- I am grateful for the opportunity to present...
- I'd like to thank you for inviting/asking me/giving me the chance to...
- Good morning/afternoon/evening ladies and gentleman
- It's my pleasant duty today to...
- I've been asked to...

告知演讲的话题
- the subject of my presentation is...
- I shall be speaking today about...
- My presentation concerns...
- Today's topic is...
- Today we are here to give a presentation on...
- Today we are here to talk about...Before we start, I'd like you meet my team members...
- A brief look at today's agenda...(告诉听众所讲内容的先后顺序)
- Before we start our presentation, let's take a brief look at the agenda...
- I shall be offering a brief analysis of...
- the main area that I intend to cover in this presentation is...
- Take a moment and think of...
- Thank you for giving me the opportunity to tell you about...

告诉听众发言的长度
- During the next ten minutes, I shall...
- I shall be speaking for about ten minutes...

- My presentation will last for about ten minutes...
- I won't take up more than ten minutes of your time...
- I don't intend to speak for longer than ten minutes...
- I know that time is short, so I intend to keep this brief
- I have a lot to cram in to the next ten minutes, so I'd better make a start...

引起听众的兴趣
- I'm going to be speaking about something that is vitally important to all of us.
- My presentation will help solve a problem that has puzzled people for years...
- At the end of this presentation you will understand why this company has been so successful for so long...
- I am going to be talking about a product that could double your profit margins...
- the next ten minutes will change your attitude to sales and marketing...
- Over the next ten minutes you are going to hear about something that will change the way your companies operate...
- By the end of this presentation you will know all there is to know about...

告诉听众内容要点
- there are five main aspects to this topic (...the first, ... the second, ...a third, ...another, ... the final)
- I am going to examine these topics in the following order (...first, ...next, ...after that, ...finally)
- I've divided my talk into five parts...
- I will deal with these topics in chronological order...
- I'm going to start with a general overview and then focus on this particular problem (...in general, ...more particularly).
- I want to start with this particular topic, and then draw some more general conclusions from it (...specifically, ... in a wider context).
- there are (a number of) factors that may affect...
- We have to take into account in any discussion of this subject, the following considerations.
- We all ought to be aware of the following points.

结束语
-In conclusion, I'd like to...
-I'd like to finish by...
-Finally...
-By way of conclusion...

-I hope I have made myself understood
-I hope you have found this useful
-I hope this has given you some idea/clear idea/an outline of...
-Let me end by saying...
-That, then was all I had to say on...
-That concludes our presentation...
-I hope I've managed to give you a clearer picture of...
-If there are any questions, I'd be delighted to...
-Thank you for your attention...
-Let's break for a coffee at this point
-I am afraid that the clock is against us, so we had better stop here
-You have been a very attentive audience---thank you