1.Announcing the Beginning of the Speech Text表示presentation主体内容开始的语句
•To begin with, I would like to talk about a principle.
•I think it would be best to start out by looking at some pictures.
•The first thing I would like to talk about is the definition of the terms which I’ll use in my presentation.
2.Shifting to the Next Main Point要点之间的过渡常用句型示例：
•Well, let's move on to the next point.
•We will now come to the second problem.
•Turning to the next question, I' 11 talk about the stages of the procedure.
•As the second topic, I shall stop here. Now let' s turn our attention to the third topic.
•So much for the methodology of our experiment. I would now like to shift to the discussion of the results.
•Now, let's move away from the first part and switch over to the next part of my presentation.
•That's all for the introduction and now we can go on to the literature review.
•Next, I would like to turn to a more difficult problem.
•The next point I'd like to talk about is the feasibility of this project.
•That brings me to my second point.
•I am glad that we can now leave this rather boring subject of mathematic deduction and go into a more attractive one, that is the application of the formula.
3.Resuming the Topic重申中心思想常用句型示例：
•Let' s come back to what I said in the first part of my speech.
•Getting back to the subject of the problem of theoretical considerations we can find that...
•I want to return to the first part of my presentation.
•Now, to get back to the effect of temperature, you may be aware that the problems have been solved.
•This brings me back to the question of security.
•At this point I would like to refer again to the question of methods in the first part of my lecture.
•Referring again to the first question, I think...
•Referring to the Coming Point
•I'll deal with it later.
•I' ll touch upon that point in a moment.
•I shall tell you in detail shortly.
4. Introducing the Supporting Materials介绍论据常用句型示例：
•I think this part is the most difficult, so I'll explain it in greater detail.
•I think this part of my paper is most important, so I plan to spend more time on it.
•Please allow me to deal with this matter more extensively.
•Being the most important part of my presentation, I will elaborate on it with more slides.
•I' ll expand this topic with drawings and figures.
•Indicating the Points Briefly
•Limited by the time available, I can only give you a very brief account of this matter.
•I don't think that I should describe the methods in detail, because they are included in the handout.
•I will not go into detail on it.
•This point has been talked about repeatedly in this symposium, so I am not going to spend too much time on it.
•Let's go through the following points very rapidly.
•I just want to outline for you what I experienced in using this new drug.
•I shall not go over all these explanations. My time is running short. So I'll be brief.
•It is sufficient to say that these experiments were poorly designed and without controls.
1.Repairing a Slip of Tone更正口误常用句型示例：
•The first of such experiments began in 2000, rather than 1999.
•May I have the lights, I mean the slides.
•The temperature increased, I shall say decreased.
•The population is 13 million, sorry, 31 million.
•The exchange rate dropped from 2.5 to 1.8, I beg your pardon, 1.9.
•As you can see from the first row, excuse me, the second row, that the output increased two fold.
2.Expressions Concerning Audio-Visual Aids寻求现场人员的帮助常用句型示例：
•Could we have the lights off? And the first slide, please.
•Lights off, first slide, please.
•Dim the lights, and first slide, please.
•The slide is not so clear. Please darken the room a little more.
•Could you please turn on the lights, please?
•Now, we can have the lights on.
•Please switch on the lights.
•Lights on, please.
•I apologize that this slide is not so clear, but I hope you can still make out the general idea.
•Sorry for the small print.
•I'm sorry we left a figure out here.
3.Explaining the Contents on the Slides向观众解释幻灯片上的内容常用句型示例
•This slide demonstrates ...
•On this slide, you can see...
•This curve in this slide shows...
•This figure in this slide exhibits...
•This table on this slide presents...
•This diagram on this slide depicts...
•This chart on this slide displaces ...
•The picture on this slide shows ...
•The photomicrograph on this slide shows ...
•The flow-chart on this slide points out...
•The circuit diagram on this slide represents...
•Indicating the Sources of the Content in a
•This figure is taken from.., by Dr. Li.
•This diagram is after that of Prof. Wang with some modification
4.Demanding to Change the Slide要求切换幻灯片常用句型示例：
•May I proceed to the next slide, please?
•I think we can move on to the next slide.
•Let me show you the next slide.
•To make a comparison, can we return to the first slide, please?
•Let's go back. No, not this one. One back. Back one more. Yes, that’s it. Thank you.
•May I go back two slides, please?
•Sorry, this one is in the wrong order. May I have the next one?
•Oh, this slide is misplaced. Please skip over it. Yes, this is the correct one.
•I'm afraid I didn't ask for this slide. Can we go back to the previous one? Please.
•Let's go through the following slides rapidly.
•The following three slides we will go through quickly without explanation.
•Wait a minute, please. I want to say more about this slide.