Introduction 引入部分
This is the first impression that your audience have of you. You should concentrate on getting your introduction right.
一般引入部分有四个目的：
welcome your audience
欢迎观众
introduce your subject
介绍主题
outline the structure of your presentation
列出提纲
give instructions about questions
对提问环节进行事先解说

以下是一些introduction部分的常用语
1. Welcoming your audience
Good morning, ladies and gentlemen
Good morning, gentlemen
Good afternoon, ladies and gentleman
Good afternoon, everybody

2. Introducing your subject
I am going to talk today about...
The purpose of my presentation is to introduce our new range of...

3. Outlining your structure
To start with I'll describe the progress made this year. Then I'll mention some of the problems we've encountered and how we overcame them. After that I'll consider the possibilities for further growth next year. Finally, I'll summarize my presentation (before concluding with some recommendations).

4. Giving instructions about questions
Do feel free to interrupt me if you have any questions.
I'll try to answer all of your questions after the presentation.
I plan to keep some time for questions after the presentation.

Body  主干部分
The body should be well structured, divided up logically, with plenty of carefully spaced visuals.
主干是真正的presentation，以下是一些注意事项：
do not hurry
不要慌张
be enthusiastic
热情饱满
give time on visuals
结合视觉辅助工具
maintain eye contact
眼神交流
modulate your voice
调节声音
look friendly
友好
keep to your structure
遵循提纲
use your notes
借助提词
signpost throughout
使用指示性语句（上一讲提过的哦）
remain polite when dealing with difficult questions
遇到刁钻问题保持礼貌

Conclusion  总结部分
这一部分的作用是：
Sum up
总结概括
(Give recommendations if appropriate)
给出合理的建议
Thank your audience
感谢
Invite questions
接受提问

以下是一些总结部分可能会用到的表达

1. summing up
To conclude,...
In conclusion,...
Now, to sum up...
So let me summarize/recap what I've said.
Finally, may I remind you of some of the main points we've considered.

2. Giving recommendations
In conclusion, my recommendations are...
I therefore suggest/propose/recommend the following strategy.

3. Thanking your audience
Many thanks for your attention.
May I thank you all for being such an attentive audience.

4. Inviting questions
Now I'll try to answer any questions you may have.
Can I answer any questions?
Are there any questions?
Do you have any questions?
Are there any final questions?

Questions 提问部分
It may be helpful for you to try to predict what questions will be asked so that you can prepare your response in advance. You may wish to accept questions at any time during your presentation, or to keep a time for questions after your presentation. Normally, it's your decision, and you should make it clear during the introduction. Be polite with all questioners, even if they ask difficult questions. Sometimes you can reformulate a question. Or answer the question with another question. Or even ask for comment from the rest of the audience.
可以事先准备一些问题的答案。你可以在presentation的任何一个过程中接受提问，但是应该事先向观众表达清楚。即使面对相对困难或刁钻的问题，也要礼貌回应，你可以重新组织一个问题，把提问引到你熟悉的领域，也可以用其它问题的答案回答不同的问题。征求一下台下观众的看法也是可行的。